It's no secret that most of an engines potential is lurking in the cylinder heads. Until recently, unleashing the hidden charms of contemporary performance engines usually meant valve upgrades and ...

Part 2 Of Our Cylinder Head Roundtable. Our All-Star Cast Of Experts Chime In On The Most Intriguing Aspects Of Cylinder Head Port Design. The intricacies of airflow dynamics through a cylinder head ...

While most Four-Valve modular owners are familiar with both B and C DOHC heads, few have even heard of the requisite A head that preceded them both. The first DOHC ...

If size is the only thing that matters, then big-block Fords would dominate the street/strip world. They don't. At least not yet, but big changes are on the horizon thanks to Air Flow Research. Most ...