Ask a big-block enthusiast what they need to make 600 hp and chances are they will point to some sort of rectangular-port head. No one in their right mind would select an oval-port head to make that ...

The E/I column represents the exhaust-to-intake flow relationship expressed as a percentage. Stock intake valve length is 5.244; this head uses 5.350, or 0.106 inch longer Stock exhaust valve length ...

Beneath that stern, intimidating glare and impressive stature is a man with few equals in the realm of cylinder head expertise. There are probably a few people who know more about cylinder heads than ...