LS/LT/LSX PRODUCTION AND C5R ALUMINUM HEADS
12629062
L92 CYLINDER HEAD ASSEMBLY
- Aluminum performance head
- Fits any LS-family engine with 4.000" bore or larger
- 2.165" solid-stem intake and 1.590" solid-stem exhaust valves
- .510" max valve lift
- As-cast L92-style intake ports
- D-shaped exhaust ports
- As-cast combustion chambers
12629063
LS3 CYLINDER HEAD ASSEMBLY
- Aluminum performance head
- Fits any LS-family engine with 4.000" bore or larger
- 2.165" hollow-stem intake and 1.590" solid-stem exhaust valves
- .550" max valve lift
- As-cast L92-style intake ports
- D-shaped exhaust ports
- As-cast combustion chambers
88958758
LS3 CNC-PORTED CYLINDER HEAD ASSEMBLY
- CNC-ported version of the LS3 cylinder head
- Flows about 10 percent more than the production head
- More than 350 cfm (intake side) at .600" lift
- 276-cc intake runners and 92-cc exhaust ports
- Fits all LS engines with 4.000" bore or larger
- 2.165" hollow-stem intake and 1.590" solid-stem exhaust valves
- .550" max valve lift
- D-shaped exhaust ports
19433498
ALL-NEW LS9 CNC-PORTED CYLINDER HEAD ASSEMBLY
- Fits all LS engines with 4.000” bore or larger
- 276cc intake ports
- 68.5cc chamber volume
- 2.165” hollow stem intake and 1.590” solid stem exhaust valves
- .550” max valve lift
- L92-style intake ports and D-shaped exhaust ports
12578449
LS7 CNC-PORTED CYLINDER HEAD ASSEMBLY
- 356-T6 aluminum head
- Fully CNC’d ports and chambers
- LS7 rectangle port design
- Assembled with 2.200" titanium intake and 1.610" sodium-filled exhaust valves
- 12° valve angle
- Minimum 4.100" bore
- 270-cc CNC’d intake ports, 85-cc CNC’d exhaust ports
- 70-cc CNC’d combustion chambers
- Capable of over 600 horsepower
- Bare head available separately
12626958
LSA CYLINDER HEAD ASSEMBLY
- CTS-V and ZL1 6.2L production cylinder head assembly
- High-strength aluminum casting for supercharged application
- Premium steel intake and exhaust valves
- Completely assembled
25534393
BARE C5R RACING CUBED CYLINDER HEAD
- The images represent a machined version of the cubed (unmachined) product. Chevrolet Performance does not supply a fully machined version of the C5R head. Image is for reference only.
- 355-T7 “as-cast” aluminum racing head
- Professional porting and machining of combustion chambers required
- No seats or guide machining
- C5R rectangle-port design – requires aftermarket rectangle-port intake manifolds
- Designed for big-bore (4.100" min) LS7/C5R/LSX blocks
- 210-cc “as-cast” intake ports
- 70-cc “as-cast” exhaust ports, same as production LS6
- 30-cc “as-cast” combustion chambers
- All fasteners are metric
- Capable of 800+ horsepower
- Standard LS exhaust port design
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LT1 CYLINDER HEAD ASSEMBLY
- Replacement for production cylinder head assembly
- Fully assembled
- Machined for direct fuel injection
19329839
LT1 CNC CYLINDER HEAD ASSEMBLY
- Fully assembled
- Machined for direct fuel injection
- CNC machine-ported intake and exhaust runners
- Included in Head and Hot Cam Kit
12699619
LT4/LT5 CYLINDER HEAD ASSEMBLY
- Rotocast A356-T6 aluminum casting used on the supercharged LT4/LT5
- Rotocast manufacturing eliminates porosity
- Machined for direct injection
- Features larger chambers than LT1 head (65.47cc) for lower compression on supercharged applications
- Assembled with 2.126” titanium intake valves and 1.590” sodium-filled exhaust valves
- Valve springs designed for production LT4/LT5 camshaft
- Not compatible with LT1 or L8T production intake manifolds
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