From Street Stock to Winston Cup, the three most important areas for engine performance improvements are cylinder heads, valvetrains, and intake manifolds. In particular, cylinder heads affect most ...

To see firsthand what goes into building a set of heads, we spent an afternoon with JMS' Pete Hillemeyer, a guy who's been building cylinder heads for more than 20 years. We also sought the counsel of ...

Cylinder head porting is one of those garage mods that lives somewhere between speed-shop legend and flow-bench science. Also referred to as port and polish, the idea is simple: Open up the intake and ...