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 ...

One of the most important pieces to the engine-combination puzzle is the cylinder heads. But navigating through the 30-plus offerings (for the small-block Ford) can be overwhelming. There are cylinder ...

Part I in the October 2002 issue began to unravel the mystery of deciphering airflow numbers that are derived from flow bench testing. We addressed the question, "Why test for airflow?" and detailed ...

"I want big power," was the comment from Editor Smitty to Mike Dezotell and myself during a brainstorming meeting last month. The power he was referring to is the little supercharged Two-Valve bullet ...

Modern internal combustion engines are under a lot of stress during normal operation. In particular, there's a lot of tension between the cylinder head and the engine block, especially in diesel ...

Chrysler Group dealers are replacing malfunctioning cylinder heads on a small percentage of 3.6-liter Pentastar V6 engines. And a recent shortage of replacement heads means some customers have been ...

Harley-Davidson introduced the Milwaukee-Eight in 2017. It provides great performance, but there are some reasons as to why ...

Head gasket sealer is a product that's supposed to temporarily fix a leaking head gasket. It works by plugging the tiny holes in your engine's cylinder head and restoring compression. When done ...