25534393 Bare C5R Racing Cubed Cylinder Head
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• The images represent a machined version of the P/N 25534393 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• 210cc "as-cast" intake ports• 70cc "as-cast" exhaust ports, same as production LS6• 30cc "as-cast" combustion chambers• All fasteners are metric• Capable of over 800 horsepower!• Standard LS exhaust port design