Everything LS

GM CHEVY LS SERIES block

Part Material Deck Bore Main Cap Crankshaft Oiling Rear Main Main Max Max Hp Usage Origin Page Number Height Bolt Material Jnl Dia. Seal Bulkhead Stroke Number
12561166
Alum 9.240″ 3.89″ 6 Nodular Std. LS (2.56) Wet/Dry 1 pc Solid 4.125″ 450 Street LS1/LS6 222
12572808 Iron 9.240″ 3.98″ 6 Nodular Std. LS (2.56) Wet/Dry 1 pc Solid 4.125″ 500 Street LQ9 222
12568950 Alum 9.240″ 4.00″ 6 Nodular Std. LS (2.56) Wet/Dry 1 pc Solid 4.125″ 450 Street LS2 223
12584727 Alum 9.240″ 4.065″ 6 Nodular Std. LS (2.56) Wet/Dry 1 pc Windowed 4.125″ 500 Street L92 223
17802854 Alum 9.240″ 4.125″ 6 Steel Std. LS (2.56) Wet/Dry 1 pc Windowed 4.125″ 500 Street LS7 224
25534427 Alum 9.240″ 4.125″ 6 Steel Std. LS (2.56) Wet/Dry 1 pc Solid 4.125″ 500+ Street LS7 224
12480030 Alum 9.240″ 4.117″–4.160″ 6 Steel Std. LS (2.56) Wet/Dry 1 pc Windowed 4.125″ 900 Pro C5R 225
19166454 Iron 9.260″ 3.990″–4.250″ 6 Nodular Std. LS (2.56) Wet/Dry 1 pc Windowed 4.250″ 1000+ Pro/Am LSX 227

GM took a chance with the LS engine. They stayed true to the pushrod small-block and continued to develop this technology to the point that building a daily-driven, 500-plus horsepower car is no big deal. The GM Performance Parts LS Series cylinder block are designed specifically for late model small-block engines that run the LS Family cylinder heads. These include the LS1, LS2, LS4, LS6, LS7, LQ4, LQ9, and L76. Our LS block selection ranges from a stock replacement all the way up to our LSX Bowtie block designed to support 2500 horsepower!

LS1_LS6_5_7L_Bare_BlockLS1_LS6_5_7L_Bare_Block_RearA. 12561166
LS1/LS6 5.7L Bare Block
• Direct replacement for 2001–2004 LS1 and LS6 Corvette 5.7L
• Production 319-T5 aluminum block with iron sleeves
• Production oiling system
• 6-bolt iron main bearing caps
• 9.240″ deck height
• Use LS1/LS6 cylinder heads only
3.89″ finished bore (99.0mm)
• No provision for ‘Active Fuel Management’
• Tested to over 400 hp!

12572808
LQ9 Cast Iron 6.0L Bare Block (not shown)
• Direct replacement for 1998–2004 LQ4 and LQ9 Truck and SUV 6.0L
• Production cast iron block
• Production oiling system
• 6-bolt iron main bearing caps
• 9.240″ deck height
• Use only LS1, LS6, LS2 or L76 cylinder heads
4.00″ finished bore (101.6mm)
• No provision for ‘Active Fuel Management’
• Tested to over 500 hp!

LS_Series_6_Bolt_Main_CapLS1_LS6_5_7L_Bare_Block_top LS1_LS6_5_7L_Bare_Block_bottom

12568950
LS2 Aluminum 6.0L Bare Block (not shown)
• Direct replacement for 2005–2007 LS2 Corvette, SSR, GTO 6.0L, and Trailblazer SS
• Production 319-T5 aluminum block with iron sleeves
• Production oiling system
• 6-bolt iron main bearing caps
• 9.240″ deck height
• Use only LS1, LS6, LS2, L76 or C5R cylinder heads
4.00″ finished bore (101.6mm)
• Provisions for ‘Active Fuel Management’
• Great for stroker cranks for even more cubes
• Tested to over 450 hp!

12584727 NEW
L92 Aluminum 6.2L Bare Block (not shown)
• Direct replacement for 2007 L92 6.2L
• Production aluminum block with iron sleeves
• Production oiling system
• 6-bolt iron main bearing caps
• 9.240″ deck height
• Use only LS1, LS6, LS2, L76 or C5R cylinder heads
4.065″ finished bore (103.25mm)
• Great for stroker cranks for even more cubes

The LS Series block Continued

17802854
LS7 7.0L Corvette Bare Block (not shown)
• Direct replacement for 2006–2007 7.0L LS7 engine
• Production 319-T5 aluminum block with pressed-in
iron sleeves
• Production oiling system
• 6-bolt ‘dowel located’ steel main bearing caps
• 9.240″ deck height
• For use with any LS series head
4.125″ finished bore (104.78mm), deck plate honed
• Siamese cylinder bores for large bore size
• No provision for ‘Active Fuel Management’
• Based on C5R block development
• Tested to over 500 hp!
Parts required to complete your LS7 Block

PART NUMBER QTY DESCRIPTION
12570471
1 Valley cover
12598292 1 Front cover assembly
21007339 4 Plug
12556437 1 Camshaft retainer
11609289 1 Plug
11610259 1 Plug, cylinder head
12551177 5 M8x1.25 flanged hex head bolt
12570326 4 Dowel, cylinder head locating
12572013 1 Rear cover assembly
12573460 1 Oil plug
12596334 1 Windage tray
11588426 2 Plug
09427693 4 Plug
01453658 2 Dowel, bell housing locating
12561663 1 Plug
12573107 1 Oil pressure sensor
12585546 1 Crankshaft position sensor

25534427 NEW
LS7 Bare Block with Solid Main Bulkheads (not shown)
• 319-T5 aluminum block with pressed-in iron sleeves
• Production oiling system
• 6-bolt ‘dowel located’ steel main bearing caps
• 9.240″ deck height
• For use with any LS series head
4.125″ finished bore (104.78mm), deck plate honed
• Siamese cylinder bores for larger bore sizes
• No provision for ‘Active Fuel Management’
• Fully machined with caps and pressed-in liners
• Limited availability
• Perfect for racing dry-sump applications
• Made to LS7 production standards for machining and cleanliness
• Based on C5R block development
• Tested to over 500 hp!

   Aluminum_C5R_Racing_BlockAluminum_C5R_Racing_Block2Aluminum_C5R_Racing_Block3Aluminum_C5R_Racing_Block4Aluminum_C5R_Racing_Block5Aluminum_C5R_Racing_Block6A. 12480030

 

 

 

 

Aluminum C5R Racing Block
This is the ultimate race version of the aluminum LS block, which enjoys the state-of-the-art technology necessary to build an LS engine to over 440 cubic inches, and 900 horsepower! Our C5R race block has seen serious race time (including wins at LeMans, GT-S, and the 24 hours of Daytona). If you are building a “big” small block for your late model Camaro, Firebird, or Corvette, this is the aluminum block for you.
• Premium “hipped” and x-rayed 356-T6M aluminum block
• Production oiling system
• 6-bolt SAE 8620 dowel located steel main bearing caps
• SAE 4340 premium main cap fasteners
• 9.240″ deck height
• For use with LS1, LS6, LS2, L76, LS7 and C5R cylinder heads
• C5R spec, special material cylinder liners
• Siamesed water jackets for larger bore size
• 4.117″ finished bore
4.160″ max bore
• Standard camshaft location and bore sizes
• 100% CMM measured for accuracy• Completely “blueprinted” and “squared”
• Included 4340 premium head studs
• AN O-ring plugs throughout
• Capable of over 900 horsepower!

GM LSX BOWTIE BLOCK NEWLSX_BOWTIE_BLOCK

The next generation of high performance GM block has been released! It’s the amazing LSX Bowtie Block, designed from the ground up to deliver maximum value while providing you with the foundation to build the LS engine of your dreams. GM Performance Parts, working with NHRA Pro Stock legend Warren “The Professor” Johnson, designed the LSX block to be the ultimate high performance LS block. Our goal was to bring the LS community race block technology at street car prices. Just like every engine part in the GM Performance Parts portfolio, the LSX Bowtie Block is held to the highest industry standards for tolerances, materials, and construction. We think that you’ll find the LSX to be the ultimate in high performance LS engine block—check out these features:
• 100% CNC Machined Cast IronLSX_Bowtie_Block2
• True Priority Main Oiling
• 6 Head Bolts per Cylinder
• Standard 4.400″ Bore Spacing
• Extra Thick Siamese Cylinder bores
• Fully machined bores, ready to hone to fit
• Semi-finished, machined decks, ready to be decked to your spec’s
• Increased Deck Thickness
• LS7 Style 6-Bolt “dowel located” main bearing caps
• Wet Sump and Dry Sump Capability
• Deep Skirted Head Bolt Holes (same as OEM aluminum block)
• All stock bolt holes are stock thread size
• Maintains all OEM LS family exterior mounting features
LSX_Bowtie_Block3• Front Motor Plate Mounting Holes Added
• Added Material around Cam Bearings for Additional Strength
• 8mm exterior/interior 5th and 6th head bolt holes
• All 5 cam bores machined for bearing P/N 12453169
• Standard .842″ lifter bores
• Screw-in soft plugs
• Accommodates any LS small block oil pan and oil pump
• External oil pump feed at rear of block
• Main web bay to bay breathing holes for increased HP
• Access windows for cylinder head stud access (intake side)
• Extra breathing pocket added near starter for better windage
LSX_Bowtie_Block4• Includes Unique New Cam Retainer, Rear Cover, Lifter Retainers and OEM replacement Cam Bearings

LSX_Bowtie_Block5

19166454
LSX Bowtie Block (Standard Deck)
• 3.990″ finished Siamese Cylinder Bores (ready to be honed to your specifications)
• 9.26″ semi-finished standard Deck Height (ready to be decked to your specifications)
• Max 4.250″ recommended Stroke
• Capable of 364 to 482+ cid
• Orange Powder Coat finish
• Accepts all Gen III & IV LS Heads, Cranks, Cams, Etc.
• Approximate Finished Weight: 225 Lbs. (Standard deck)

The LSX Block includes the following:
19166177
Cam Thrust Plate
19166178 Rear Cover
19166182 Tappet Guide

For the advanced LSX competition engine builder, you will fully enjoy reading the following features of the new LSX Bowtie Block:
• Front oil feed holes can be plugged/restricted for mechanical flat tapped or mechanical roller lifter applications
• Can be machined safely to 9.20″ deck height
• Main Bearing Cap bolt threads can be machined for aftermarket premium 12mm fasteners
• Maximum 4.250″ bore at .200″ minimum wall thickness (naturally aspirated applications)
• 6-bolt head bolt pattern (for boosted applications)
• Machined for 8mm Inner and outer 5th and 6th head bolts
• Standard bolt holes can be machined for 1/2″ studs
• Cam bores can be machined to accept 60mm roller bearings
• Can be machined for larger diameter lifters and/or 1.060″ bronze bushings
• Front oil feed lines can be plugged and external oil pump and/or aftermarket dry sump systems can be used via oil pump feed at rear of block—may be required with certain large stroke/aluminum rod combinations
• Belt cam drive systems can be accommodated—some machining will be required
• External oil pump feed at rear of block
• 7th transmission bolt hole has been added (per early SBC), stud can be installed for sanctioning body requirements
• Front motor plate can be used for racing chassis applications (sprint car, drag racing, truck pulling, etc.)
• Threaded water plugs can be used for external heaters or coolers

The LSX block made its public debut at the 2006 SEMA show in the Reggie Jackson ’69 Camaro project car—a joint effort between GM Performance Parts and GM Performance Division. This car also starred in a Hot Rod TV episode—the first to air on ESPN. The engine that powers this amazing “evolved Camaro” features a 454-cubic-inch LSX short block, prototype LSX cylinder heads, an LS7 carbureted intake manifold, a pump gas-friendly compression ratio, and over 640 horsepower. This is just a sample of what you can do with your own LSX block!

Look for the LSX block to spawn LSX-specific cylinder heads, intakes, cams, and crate engines. And, watch for GM Performance Parts to continue to lead the industry in value-based high performance engine block, components, and crate engines.

Lifter_Boss_Detail Bay_to_Bay_Breathing

LS Bare Block Completion Kit   –      Sample Kit Pictured  
LS 3 Bare Block Completion Basic

Part # Qty Part Description
12599296 1 Valley Cover w/ bolts, seals, gasket and pcv baffle
12599298 1 PCV Tube
12600325 1 Front Cover w/ Cam Sensor, Seal, Bolts & Gasket
12602548 1 Coolant Crossover Pipe
12602540 2 Coolant Caps
11588714 4 Coolant Pipe/Cap Bolts
12615666 1 Rear Crankshaft Seal Housing
12574293 1 Rear Crankshaft Seal Housing Gasket
11515758 12 Rear Crankshaft Seal Housing Bolts
89060436 1 Rear Crankshaft Seal
12573460 1 Oil Galley Rear Plug w/ Seal
11588949 2 Oil Plug Side
9427693 4 Water Drain Plug Frt
1453658 2 Transmission Dowel
11609289 1 Water Drain Plug – Hex
12589016 1 Camshaft Retainer Plate
11561455 4 Camshaft Retainer Plate Bolt

LS 3 Bare Block Completion w/ Sensors

Part # Qty Part Description
12599296 1 Valley Cover w/ bolts, seals, gasket and pcv baffle
12599298 1 PCV Tube
12600325 1 Front Cover w/ Cam Sensor, Seal, Bolts & Gasket
12602548 1 Coolant Crossover Pipe
12602540 2 Coolant Caps
11588714 4 Coolant Pipe/Cap Bolts
12615666 1 Rear Crankshaft Seal Housing
12574293 1 Rear Crankshaft Seal Housing Gasket
11515758 12 Rear Crankshaft Seal Housing Bolts
89060436 1 Rear Crankshaft Seal
12573460 1 Oil Galley Rear Plug w/ Seal
11588949 2 Oil Plug Side
9427693 4 Water Drain Plug Frt
1453658 2 Transmission Dowel
11609289 1 Water Drain Plug – Hex
12589016 1 Camshaft Retainer Plate
11561455 4 Camshaft Retainer Plate Bolt
12570125 2 Knock sensor
12585546 1 Crankshaft Position Sensor
11515756 1 Crankshaft Position Sensor Bolt

LS3 Bare Block Completion w/ Sensors and Timing Components

Part # Qty Part Description
12599296 1 Valley Cover w/ bolts, seals, gasket and pcv baffle
12599298 1 PCV Tube
12600325 1 Front Cover w/ Cam Sensor, Seal, Bolts & Gasket
12602548 1 Coolant Crossover Pipe
12602540 2 Coolant Caps
11588714 4 Coolant Pipe/Cap Bolts
12615666 1 Rear Crankshaft Seal Housing
12574293 1 Rear Crankshaft Seal Housing Gasket
11515758 12 Rear Crankshaft Seal Housing Bolts
89060436 1 Rear Crankshaft Seal
12573460 1 Oil Galley Rear Plug w/ Seal
11588949 2 Oil Plug Side
9427693 4 Water Drain Plug Frt
1453658 2 Transmission Dowel
11609289 1 Water Drain Plug – Hex
12589016 1 Camshaft Retainer Plate
11561455 4 Camshaft Retainer Plate Bolt
12570125 2 Knock sensor
12585546 1 Crankshaft Position Sensor
11515756 1 Crankshaft Position Sensor Bolt
12591689 1 Cam Gear
11561283 1 Cam Gear Bolt
12556582 1 Crank Gear
12586482 1 Timing Chain
12588670 1 Timing Chain Dampener/Slide w/Bolts
12601402 1 Balancer
12557840 1 Balancer Bolt
12595365 4 Valve Lifter Guides
12551163 4 Valve Lifter Guides Bolts

GM CONNECTING RODS & COMPONENTS

1997_2004_Connecting_Rod12568734

1997–2004 Connecting Rod
• Connecting rod for use on all 1997– 2004 production Corvettes and 1998–2002 Camaro/Firebird
• 6.098″ C-C length
• Sold individually

 

12577583
LS2 Connecting Rod (not shown)
• Connecting rod used in 2005–2007 LS2 engines has bronze bushing
• 6.098″ C-C length
• Sold individually

11610158
LS6 Rod Bolts (not shown)
• Recommended for use in performance Gen III engines
• Bolts have greater strength than pre-2000 rod bolts
• One bolt per package. Order two per connecting rod.

LS7_Connecting_Rod12586258
LS7 Connecting Rod
• Titanium connecting rod used in 2006–2007 LS7 crate engines
• 6.067″ C-C length
• Sold individually

11609825
LS7 Connecting Rod Bolt Kit
• Required for LS7 engine builds
• Includes 16 bolts

GM PISTONS & RINGS

GM Performance Parts pistons are top quality and are ready for the rigors of high-performance street and competition applications. They’re factory tested, so you know you’re getting the right parts for your LS Series engine. Pistons are sold individually unless otherwise specified.

GM LS SERIES RINGS

Part Number Bore Size Oversize Ring Thicknesses Description
12499234
3.898″ — 1.5, 1.5, 2.5mm Set of 8 ring packs, standard size for LS1 & LS6
12499236 4.000″ — 1.5, 1.5, 2.5mm Set of 8 ring packs, standard size for 1999-2005 LQ4 & LQ9
12499235 3.780″ — 1.5, 1.5, 2.5mm Set of 8 ring packs, standard size for 1999-2005 5.3L engines
89017484 4.000″ — 1.2, 1.5, 2.5mm Production ring pack for ’05-’06 LS2, ’06 L76
88894243 4.000″ — 1.5, 1.5, 2.5mm Production ring pack for ’05-’06 LQ9
89017776 4.125″ — 1.2, 1.2, 2.0mm Production ring pack for ’06 LS7
89017777 4.125″ +.020″ 1.2, 1.2, 2.0mm Oversize LS7 ring pack

GM CRANKSHAFTS

Crankshaft_Assembly_1997_2004A. 89017522
Crankshaft Assembly 1997–2004
• Nodular cast 3.622″ stroke crankshaft assembly has 24X reluctor wheel installed
• Used on 1998–2002 F-cars and 1997–2005 Corvettes

12588612
LS2 Crankshaft Assembly (not shown)
• Nodular cast 3.622″ stroke crankshaft assembly has 58X reluctor wheel installed
• Used on 2006–2007 Corvettes

12568820
LS7 Forged Steel Crankshaft (not shown)
• Forged 4″ stroke crankshaft for LS7 engine
• Includes 58X reluctor wheel

Reluctor_Wheel_24XB. 12559353
Reluctor Wheel, 24X
• 24-tooth crankshaft position sensor timing wheel for 1997–2005 engines

12586768
Reluctor Wheel, 58X (not shown)
• 58-tooth crankshaft position sensor timing wheel for 2006–2007 engines

THE GM LS FAMILY ALUMINUM HEADS

The LS Family of GM engines has continued our tradition of raising the power potential of the legendary small-block V-8. The LS6 cylinder head came as standard equipment on the amazing 405-horse Z06 Corvette and the 2005 Corvette with the LS2 engine. These heads can be installed on any 1997-2005 LS Family of V-8 engines (except 4.8L & 5.3L versions), and the GM Performance Parts engineers have even designed fully-CNC-ported versions to get your late model GM engine screaming right along. Our complete assemblies come with bee-hive valve springs and light weight hollow stem valves—innovations that our competitors have had to copy to catch up to our designs. We’ve already done the validation of these heads in competition in our show room stock C5R Corvette racecar, so you can be assured our LS6 race heads will live up to your demands.

Aluminum LS Family Head Technical Notes:
• Aluminum 356-T6
• High efficiency combustion chambers
• Symmetrical intake and exhaust ports (not mirrored like Gen I small block)
• Angled spark plugs, (14mm, 5/8″ hex, 3/4″ reach, taper-seat plugs)
• 15 valve angles (except C5R and LS7)
• Bolt-down type rocker arms
• Center-bolt pattern valve covers required
• Will not work on Gen I or Gen II small-block

LS Series Cylinder Heads

Part Description Material Port Port Valve Chamber Int Exh Plug Heat Rocker Notes Page Number Size Type Angle CC’s Vlv Vlv Type Riser Stud Number
12480005
C5R 1st design Aluminum 210 Rec C5R 11 deg 38 2.18 1.63 Angled No Shaft As-cast, no seats/guides N/S
12480090 C5R 2nd design Aluminum 210 Rec C5R 11 deg 30 2.18 1.63 Angled No Shaft As-cast, no seats/guides 230
12564824 Stock LS6 Aluminum 210 Cath 15 deg 64.5 2.00 1.55 Angled No Bolt Hollow/sodium filled valves 228
88958622 CNC LS6 Aluminum 250 Cath 15 deg 61.9 2.00 1.55 Angled No Bolt 11.2 compression 228
88958665 CNC LS6 Aluminum 250 Cath 15 deg 65 2.00 1.55 Angled No Bolt 10.5 compression 228
12564825 Bare LS2 & LS6 Aluminum 210 Cath 15 deg 64.5 2.00 1.55 Angled No Bolt Bare LS2/LS6 228
12576063 Stock LS2 Aluminum 210 Cath 15 deg 64.5 2.00 1.55 Angled No Bolt Solid stem valves 229
88958765 CNC LS2 Aluminum 250 Cath 15 deg 64.5 2.00 1.55 Angled No Bolt Solid stem valves 229
12582714 Bare L92 Aluminum 260 Rec L92 15 deg 70 2.16 1.59 Angled No Bolt Bare L92 229
12582713 L92 Aluminum 260 Rec L92 15 deg 70 2.16 1.59 Angled No Bolt Solid stem valves 229
12578450 Bare LS7 Aluminum 270 Rec LS7 12 deg 70 2.20 1.61 Angled No Bolt Bare LS7 230
12578449 Stock LS7 Aluminum 270 Rec LS7 12 deg 70 2.20 1.61 Angled No Bolt Titanium/sodium filled valves 230
25534428 As-cast LS7 Aluminum — Rec LS7 12 deg 66 2.20 1.61 Angled No Bolt As-cast, bare head 230

 

LS6_Cylinder_Head_AssemblyA. 12564824
LS6 Cylinder Head Assembly
• Fits any 1997-2007 LS Family engine*
• 2.00″ hollow stem intake, and 1.55”sodium filled exhaust valves
• .570″ max valve lift
• 210cc “Cathedral port” intake ports
• 70cc D-shaped exhaust ports
• 65cc combustion chambers
• Bare head P/N 12564825 available separatelyLS6_Cylinder_Head_Assembly_intakeLS6_Cylinder_Head_Assembly_combustion_chamber

88958665
CNC-Ported LS6 Cylinder Head Assembly (not shown)
• CNC-ported aluminum performance head
• Fits any 1997-2007 LS family engine*
• 2.00″ Hollow stem intake, and 1.55″ sodium filled exhaust valves
• .570″ max valve lift
• 250cc CNC’d “Cathedral port” intake ports
• 85cc CNC’d D-shaped exhaust ports
• 65cc CNC’d combustion chambers
• Bare head P/N 12564825 available separately

88958622
CNC-Ported LS6 Racing Cylinder Head Assembly (not shown)
• CNC-ported aluminum racing head
• 2.00″ Hollow stem intake, and 1.55″ sodium filled exhaust valves
• .570″ max valve lift
• 250cc CNC’d “Cathedral port” intake ports
• 85cc CNC’d D-shaped exhaust ports
• 62cc CNC’d combustion chambers
• Bare head P/N 12564825 available separately

Heads 12564824, 88958665 and 88958622 are assembled with the following components:
12565311
Intake Valves 10166344 Valve Spring Retainers
12565312 Exhaust Valves 12482063 Intake Valve Stem Seals
12586484 Valve Springs 12482062 Exhaust Valve Stem Seals
10166345 Valve Locks

 

12576063
LS2 Cylinder Head Assembly (not shown)
• Lower cost alternative to the LS6 CNC head
• Fits any 1997–2007 LS family engine*
• 2.00″ Solid stem intake, and 1.55″ solid stem exhaust valves
• .570″ max valve lift
• 210cc “Cathedral port” intake ports
• 70cc D-shaped exhaust ports
• 65cc combustion chambers
• Bare head P/N 12564825 available separately

CNC_Ported_LS2_Cylinder_Head_Assembly_exhaustB. 88958765
CNC-Ported LS2 Cylinder Head Assembly
• CNC-ported aluminum performance head
• Lower cost alternative to the CNC LS6 head
• Fits any 1997–2007 LS family engine*
• 2.00″ Solid stem intake, and 1.55″ solid stem exhaust valves
• .570″ max valve lift
• 250cc CNC’d “Cathedral port” intake ports
• 85cc CNC’d D-shaped exhaust ports
• 65cc CNC’d combustion chambers
• Bare head P/N 12564825 available separatelyCNC_Ported_LS2_Cylinder_Head_Assembly_intakeCNC Ported LS2 Cyl Head

Heads 12576063 and 88958765 are assembled with the following components:
12563063
Intake Valves 10166344 Valve Spring Retainers
12563064 Exhaust Valves 12482063 Intake Valve Stem Seals
12586484 Valve Springs 12482062 Exhaust Valve Stem Seals
10166345 Valve Locks
LS2 & LS6 Head Flow Data:
Lift
0.2 0.3 0.4 0.5 0.6
Stock intake 136 195 237 260 260
Stock exhaust 104 135 157 169 180
CNC intake 147 215 262 290 307
CNC exhaust 111 155 198 210 218

L76_L92_Cylinder_Head_Assembly_exhaustC. 12582713 NEW
L76/L92 Cylinder Head Assembly
• Aluminum performance head
• Higher flow than cathedral port LS heads
• Fits any LS family engine with 4.00″ bore or larger
• 2.16″ solid stem intake, and 1.59″ solid stem exhaust valves
• .510″ max valve lift with stock springs
• As-cast “rectangle port” intake ports (not compatible with LS7 intakes)
• D-shaped exhaust ports
• As-cast combustion chambers
• Uses bare head P/N 12582714L76_L92_Cylinder_Head_Assembly_intakeL76/L92 Cyl. Head

Head 12582713 is assembled with the following components:
12590771
Intake Valves 10166344 Valve Spring Retainers
12582719 Exhaust Valves 12482063 Intake Valve Stem Seals
12589774 Valve Springs 12482062 Exhaust Valve Stem Seals
10166345 Valve Locks
L76/L92 Head Flow Data:
Lift
0.2 0.3 0.4 0.5 0.6
Intake 154 225 275 309 330
Exhaust 121 154 180 194 202

The LS Family Aluminum Heads Continued

Bare_C5R_Racing_Cylinder_Head_exhaustA. 12480090
Bare C5R Racing Cylinder Head
• 355-T7 “as-cast” Aluminum racing head
• Professional porting and machining of combustion chambers required
• No seats or guides
• C5R Rectangle port design—requires rectangle port intake manifolds
• Designed for 2.180″/1.625″ valves
• Valve angle revised to 11
• Machined for 1.625″ diameter valve springs & .500″ guides
• Designed for big bore LS7/C5R/LSX block
• 210cc “as-cast” intake ports
• 70cc “as-cast” exhaust ports, same as production LS6
• 30cc “as-cast” combustion chambers
• All fasteners are metric
• Valve cover rails have O-ring groove for .125″ O-ring
• Capable of over 800 horsepower!Bare_C5R_Racing_Cylinder_Head_intake
Bare C5R Racing Head

12578449
LS7 Cylinder Head Assembly (not shown)
• 356-T6 aluminum head
• Fully CNC’d ports and chambers
• C5R/LS7 rectangle port design—requires rectangle port intake manifold P/N 25534394 or 12568976
• Assembled with 2.20” titanium intake and 1.61” sodium filled exhaust valves
• 12 valve angle
• Designed for big bore LS7/C5R/LSX block (min 4.065″ bore)
• 270cc CNC’d intake ports
• 85cc CNC’d exhaust ports
• 70cc CNC’d combustion chambers
• All fasteners are metric
• Capable of over 600 horsepower
• Bare head P/N 12575450 available separately

This head is assembled with the following components:
12591644
Intake Valves 12596508 Valve Spring Retainers
12578455 Exhaust Valves 12482063 Intake Valve Stem Seals
12578457 Valve Springs 12482062 Exhaust Valve Stem Seals
10166345 Valve Locks 12596509 Intake Valve Lash Cap
LS7 Head Flow Data:
Lift
0.1 0.2 0.3 0.4 0.5 0.55 0.6 0.7
Intake 71.0 145.0 222.0 271.0 315.0 332.0 348.0 352.0
Exhaust 60.0 120.0 159.0 192.0 207.0 214.0 219.0 221.0

25534428 NEW
LS7 Bare Unported Cylinder Head (not shown)
• 356-T6 aluminum head
• C5R/LS7 rectangle port design—requires rectangle port intake manifold P/N 25534394 or 12568976
• Machined for 2.20″/1.61″ valves
• Designed for big bore LS7/C5R/LSX block (min 4.065″ bore)
• Limited availability

17801930
LS6 Hollow Stem Valve Kit (not shown)
• Kit of (4) intake and (4) exhaust valves originally for LS6 engines to drop right into your LS2 head
• One kit services one head

19153789 NEW
Bare Block Completion Kit, Gen III (not shown)
• Includes all parts to complete a Gen III bare block

The kit includes:
PART NUMBER QTY DESCRIPTION
12575742
01 Valley Cover
12561211 01 Cam Sensor
11515756 08 Bolt
12570471 01 Valley Cover
12561243 01 Front Cover
11515758 08 Bolt
12572014 01 Rear Crankshaft Seal Housing
12556127 12 Bolt
12602972 01 Rear Crankshaft Oil Seal
12574293 01 Rear Crankshaft Seal Housing Gasket
12573460 01 Oil Galley Plug
11588949 02 Oil Plug
09427693 04 Water Drain Plug
01453658 02 Transmission Alignment Dowel
12561663 01 Water Drain Plug
12556437 01 Camshaft Retainer Plate

GM TIMING CHAINS AND SPROCKETS

12576407
Camshaft Sprocket
• Fits LS1, LS2 and LS6

12556582
Crankshaft Sprocket
• Fits LS1, LS2 and LS6

12586482
Chain Assembly
• Fits LS1, LS2 and LS6

NOTE:

88958607
LS1, LS6 Timing Chain Dampener
• Improves timing chain life in high-rpm applications
• Will not fit LS2 and LS7 block
• Use only in applications as a replacement. (For new installments, use P/N 12588670.)
Some block require drilling and tapping; instructions included.

12588670
LS2 Timing Chain Dampener
• Production LS2 Dampener will not fit LS1 and LS6 block fitted with P/N 88958607

 

GM ACCESSORY DRIVE KITS

19155066 NEW
Serpentine Accessory Drive System, with Air Conditioning
• Fits LS1 and LS6
• Deluxe kit includes all the components and hardware necessary to install on an engine with air conditioning, including water pump, alternator, power steering pump and idler bracket. (Belt included).The system includes:
12572188
Belt (water pump, alternator, and power steering)
12569528 Belt (A/C compressor)
12568181 Tensioner Assembly
12560345 A/C Belt Tensioner Assembly
12557334 A/C Compressor Idler Pulley
1137031 A/C Compressor
12556444 A/C Compressor Bracket
15261472 Power Steering Pump (reman)
12555222 Power Steering Bracket
12578068 Alternator and Power Steering Pump Bracket
12555693 Power Steering Pump Brace
12559890 Power Steering Pump Pulley
10353440 Alternator
26046502 Power Steering Reservoir
19155067 NEW
Serpentine Accessory Drive System, with Air Conditioning
• Fits LS2 and LS7
• Deluxe kit included all the components and hardware necessary to install on an engine with air conditioning, including water pump, alternator, power steering pump and idler bracket. (Belt included).The system includes:
12579229
Belt (water pump, alternator, and power steering)
12585476 Belt (A/C compressor, LS7)
12569301 Tensioner Assembly
12595289 A/C Belt Tensioner Assembly
12568996 Idler Pulley
88958093 A/C Compressor
12569286 A/C Compressor Bracket
15261472 Power Steering Pump (reman)
26046502 Power Steering Reservoir
12578067 Alternator and Power Steering Pump Bracket
12555693 Power Steering Pump Brace
12568997 Power Steering Pump Pulley
15841234 Alternator
12579228 Belt (A/C compressor, LS2)

 

GM CYLINDER HEAD GASKETS & HEAD BOLTS

12498543
Cylinder Head Gasket Kit (not shown)
• Two head gaskets for 1997–2001 LS1 Camaro/Firebird and Corvette engines
• Also fits 2001 LS6 Corvette engine

12498544
Cylinder Head Gasket Kit (not shown)
• Two head gaskets for 2002–2004 LS1Camaro/Firebird and Corvette engines

12498545
Cylinder Head Bolt Kit (1997–2003) (not shown)
• Kit of 15 head bolts for 1998–2003 LS1 Camaro/Firebird and 1997–2003 Corvette; and 2001–2003 LS6 Corvette
• One kit per cylinder head. Order two per engine.
• Head bolts cannot be reused on these engines

IMPORTANT!! LS Series engines produced from January 2004 forward on have a new, “short”-style head bolt design. Earlier head bolts WILL NOT fit. Order 17800568 for engines produced from January 2004 and after.

17800568
Cylinder Head Bolt Kit (not shown)
• Kit of 15 bolts for LS Series engines produced from January 2004 and later
• Bolts are 5mm shorter than previous design

LS1_Cylinder_Head_Installation_Kit_F_Car 12499217
LS1 Cylinder Head Installation Kit (F-Car)
• Comprehensive cylinder head installation kit for 2002 Camaro and Firebird models equipped with the LS1 engine
• Kit includes two head gaskets, two valve cover gaskets, eight intake manifold gaskets, two exhaust manifold gaskets, two intake manifold-to-block seals, 16 cylinder head bolts and 14 cylinder head bolt/screws

12499218
Corvette LS1/LS6 Cylinder Head Installation Kit (not shown)
• Comprehensive cylinder head installation kit for 2002–2005 Corvette models equipped with the LS1engine, or 2002–2004 Corvette models equipped with the LS6 engine
• Kit includes two head gaskets, two valve cover gaskets, eight intake manifold gaskets, two exhaust manifold gaskets, two intake manifold-to-block seals, 16 cylinder head bolts and 14 cylinder head bolt/screws

 

GM VALVE COVERS
Valve_Cover_Corvette
12480025
Valve Cover, Corvette
• Aluminum valve cover designed for racing cylinder head P/N 12480005 and 12480090
• Fits production center-bolt LS Series cylinder heads
• Sold as single piece. Order two per engine.

LS_Center_Bolt_Competition_Valve_Cover_with_Breather_Hole 25534398
LS Center-Bolt Competition Valve Cover (with Breather Hole)
• Aluminum valve cover designed for production center-bolt LS Series cylinder heads
• Sold as single piece. Order two per engine.

LS_Center_Bolt_Competition_Valve_Cover 25534399
LS Center-Bolt Competition Valve Cover
• Aluminum valve cover designed for production center-bolt LS Series cylinder heads
• Sold as single piece. Order two per engine.

 

GM OIL PANS & ACCESSORIES

Listing of many LS Oil Pan Options:

 

Corvette_Oil_Pan_2002_2004_LS6 12561828
Corvette Oil Pan (2002–2004 LS6)
• Used on 2002–2004 Corvettes with LS6 V-8

F_Car_Oil_Pan 12558762
F-Car Oil Pan
• Used on 1998–2003 Camaro and Firebird LS1 V-8

 

19212593 – LS Wet Sump RWD Oil Pan Pan Kit Kit comes with the following items:

  • RWD oil pan
  • Oil pick up tube and screen
  • Oil pan gasket
  • Oil pan bolts
  • Windage tray
  • Windage tray bolts
  • Dipstick & tube
               

 

Magnetic_Drain_Plug 23011420
Magnetic Drain Plug
• Catches and holds small pieces of metal before they can cause damage

17801830
High Volume LS Oil Pump Kit (not shown)
• High Volume pump assembly for LS Series engines (except LS7 applications)
• Pump pick up seal included

GM OIL FILTERS AND ADAPTERSLS7_Oil_Hose_Adapters

 25534412 NEW
LS7 Oil Hose Adapters
• Kit adapts the production LS7 Oil Pan to aftermarket AN style hoses for aftermarket dry sump oil tanks
• Bolts directly to LS7 Oil Pan, and has AN male outlet for -12 AN fittings
• Includes (2) fittings, (2) bolts, and (2) sealing gaskets

GM EXHAUST MANIFOLD/HEADER

Header_Flange12480130
Header Flange
• These 3/8″ thick steel header flanges are a great way to start a fabricated set of LS series Headers for a racecar or street rod
• For stock LS1, LS2, LS6 and LS7 exhaust ports

 

GM INTAKE MANIFOLDS

LS6_Intake_Manifold 88894339
LS6 Intake Manifold
• Gen III fuel injected nylon manifold used on the 2001–2004 LS6 Corvette engine
• Supplied with the intake manifold seal P/N 12560251, gasket
P/N 12533587, throttle body seal P/N 12552542, MAP sensor
P/N 16212460, and MAP sensor seal P/N 16194007

 

LS2_Series_B_series_4_Barrel_Intake_Manifold88958675
LS2 4-Barrel Intake Manifold
• Allows you to install a four-barrel carburetor on a LS Series engine with cathedral ports (LS1, LS6, LS2)
• Cast aluminum open-plenum intake manifold accepts a 4150-style square-bore carburetor
• Bosses for EFI injectors for custom applications
• Bolts and instructions supplied An ignition driver is required.

 

25534394 NEW
LS7 4-Barrel Intake Manifold (not shown)
• GM Racing design for use on LS7 heads
• As-cast design requires no porting for maximum performance
• Includes mounting bolts and instructions
• Requires aftermarket gasket
• Machined for 4150-style carburetors and has 3/8″ NPT vacuum boss An ignition driver is required.

25534401 NEW
L76/L92 4-Barrel Intake Manifold (not shown)
• GM Racing design for use on “as-cast” rectangle port Gen IV cylinder heads
• As-cast design requires no porting for maximum performance
• Includes mounting bolts and instructions
• Requires aftermarket gasket
• Machined for 4150-style carburetors and has 3/8″ NPT vacuum boss An ignition driver is required.

Carburetor_Spacer_Single_Plane_One_Two_Inch 88965830
Carburetor Spacer, Single Plane, One-Inch
• Fully CNC’d from billet aluminum
• GM Performance Parts logo machined into front and back

88965831
Carburetor Spacer, Single Plane,Two-Inch
• Fully CNC’d from billet aluminum
• GM Performance Parts logo machined into front and back

LS_Front_Distributor_Drive_Cover88958679
LS Front Distributor Drive Cover
• Assembly is manufactured for applications where a 4-barrel carburetor and distributor are required
• Can be combined with GM’s new Bowtie valve covers
P/N 25534398 and P/N 25534399 for a complete traditional looking engine package
Distributor and mechanical fuel pump not included. Uses small-block Ford style distributor and mechanical fuel pump.

12568976 NEW
LS7 Production Intake Manifold Assembly (not shown)
• Gen IV fuel injection nylon manifold used on the 2006–2007 Corvette Z06 LS7 engine
• Fully assembled with injectors, fuel rail, 90mm ETC throttle body and gaskets
• For use only with LS7 cylinder heads P/N 12578449 and 25534428

12590123 NEW
L76 Production Car Intake Manifold Assembly (not shown)
• Gen IV fuel injection nylon manifold used on the 2007 Australian Holden L76 car engine
• Fully assembled with injectors, fuel rail, 90mm ETC throttle body and gaskets
• For use only with L92/L76 cylinder heads P/N 12582713

 

GM VALVE LIFTERS
12499225
LS Series Camshaft Lifter Kit (not shown)
• Set of 16 lifters for LS Series engines
• Same lifter used in LS2 and LS7

17803305
Lifter Guide Kit (not shown)
• Includes lifter guides and 4 bolts
• Makes for quick and easy cam swaps without having to remove the intake manifold, valley plate or heads
• Works in Gen III and IV applications (except with AFM)

Racing_Hydraulic_Roller_Lifter_Kit 88958689 NEW
Racing Hydraulic Roller Lifter Kit
• As developed by GM Racing and GM Powertrain
• For use in Gen III and Gen IV engines where sustained high rpm’s are typical
• Special reduced-mass internal components allow for higher limiting speeds with aggressive camshaft designs
• Improved valvetrain dynamics and stability will improve horsepower, and high rpm’s
• Tested to 8000 rpm in GM Racing applications
• Set of 16

 

GM LS SERIES CAMSHAFTS

Part Description Duration Maximum Lobe Technical Notes Number @ .050″ Lift (in) Centerline Lift (deg) (deg)
12565308
2002–2004 LS6 I: 204 I: .550 117.5 Cam requires valve spring P/N 12586484 E: 218 E: .550
12560950 2001 LS6/ Vortec I: 207 I: .525 116 Cam requires valve spring P/N 12586484 engines E: 217 E: .525
12480110 LS1 I: 226 I: .525 110 Cam requires valve spring P/N 12586484; “ASA” cam for off-highway use E: 236 E: .525
12480033 Hot cam kit I: 219 I: .525 112 Kit includes 16 LS6 valve springs P/N 12565117 LS6 E: 228 E: .525
88958606 Roller cam I: 239 I: .570 106.5 Showroom Stock racing design; requires hollow stem intake valves P/N 12565311,
LS1 or LS6 E: 251 E: .570 hollow stem exhaust valves P/N 12565312, valve springs P/N 12586484, and aftermarket notched pistons OR machine stock pistons
12561721 LQ9: 2002–2006 I: 196 I: 467 116 Stock cam for 2002–2006 LQ9 and 2001-2004 LS1 engines LS1: 2001–-2004 E: 201 E: 47

88958733 Hot cam only 219/228 .525 lift

88958722 Stage 2 227/239 .551 lift

88958723 Stage 3 233/276 .595 lift

GM CAMSHAFTS

12499228
Cam Installation Kit, LS Engine (not shown)
• Complete gasket kit to make cam swaps easier
• Includes all necessary gaskets and balancer bolt