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Vehicle Info NeededCHEVROLET PERFORMANCEPART NUMBER: 809-25534393
LS-Series C5R Racing Cylinder Head, Bare "Cubed"
$2,00213
Ships on 09/14/2026
Lowest Price GuaranteeC5R Racing Aluminum Cylinder Head
- LS-Series C5R Racing Cylinder Head
- Bare "Cubed"
- 355-T7 Aluminum
- As-Cast Unmachined
- Sold Individually, 1/pkg
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
The Chevrolet Performance C5R/LSX/LS7 Racing Aluminum Cylinder Head is an unmachined "cubed" aluminum racing head designed for the professional engine or cylinder head builder. This allows a clean slate start to design the ultimate racing cylinder head for a 4.100" or larger bore LS-series racing engine. This cylinder head design has been validated in competition in the showroom stock C5R Corvette race car program, so be assured this head will live up to your demands!
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Features:
- The images shown represent a machined version of the cubed (unmachined) product. Chevrolet Performance does not supply a fully machined version of the C5R head. Images are for reference only.
- 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
- 210cc "as-cast" intake ports
- 70cc "as-cast" exhaust ports, same as production LS6
- 30cc "as-cast" combustion chambers
- All fasteners are metric
- Standard LS exhaust port design
- Capable of over 800 horsepower!
Part TypeCylinder Head
Product LineChevrolet Performance C5R/LSX/LS7 Racing Aluminum Cylinder Head
BrandCHEVROLET PERFORMANCE
Package Height6.2
Package Width8.9
Package Length510.03
Weight32.54 PG
Part CategoryPerformance Parts
Overall Width (In)8.73
Overall Width (Mm)221.74
MaterialAluminum
Intake Valve Diameter2.18
Valve Angle (Deg)11 deg
Guide Plates IncludedNo
Combustion Chamber Volume38
Intake Valve Lift (In)2.18
Intake Runner Volume210
Part FitmentSemi Universal
Grade TypePerformance
Exhaust Valve Diameter1.63
Vendor Part Number25534393
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
