Chevrolet Performance 25534393 - Bare C5R Racing Cubed Cylinder Head

The images represent 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 designrequires 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