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.

Dyno-testing cylinder heads and a cam upgrade on a 5.0L pushrod engine.

Testing cylinder heads on an LS2 engine - GM High Tech Performance Magazine ...