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 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.