When checking a modification, it is imperative that the test procedure remains constant. The most common component, the cylinder head, is wide open to testing mistakes.

Read the tech article on Making Sense of Cylinder Head Flow Testing, brought to you by the experts at High Performance Pontiac Magazine.

Here, we have two sets of Pro Comp Heads that are going to be put to the test to see if the CNC-porting is worth it's price. More details and photos on the test only in Muscle Mustang & Fast Fords ...