Getting a set of Cosworth premium ported cylinder heads eliminates the need of waiting for a machine shop to inspect your heads of any damage or cracking before the actual porting begins. These heads have been precision ported on a 5 axis machine to provide an abundance of flow for those looking to make more horsepower in the EJ25.
These particular Cylider Heads will come with assembled with +1MM intake and exhaust valves, along with a set of Cosworth S2 camshafts which will allow the EJ25 to really outflow the factory numbers while achieving greater gains in top end power.
These are perfect for those of you who have a serious blue print that involves a larger turbocharger and more boost, and need the heads to flow the numbers needed to reach your goals.
COS1 SB0034, Intake Valves
COS1 SB0033, Exhaust Valves
COS1 KK3766, Cams
COS1 KK3839, Valve Springs