A Heads-Up View Compared to the production pieces, the differences in the intake port are subtle, starting with the more open port bowls of the Stage V. Farther down, the valveguide boss in the intake ...

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 ...

This episode of Engine Masters presented by AMSOIL reinforces the fact that Steve Dulcich is not just the guy in the back of the dyno room—he’s a legit engine master. And you won’t question that after ...

Without question, cylinder-head porting is a science. The act of removing metal from the intake and exhaust ports to increase airflow has been used for decades, and in most cases, a skilled head ...