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 ...

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 ...

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 ...

Like it or not, cylinder head design is a subject that's very complex, and it's impossible to make it simple. Considering that no single component on an engine affects power output more than the ...

While looking around on modified.com recently, I noticed a post on the site's forum asking what cylinder head porting and polishing is. The person who posted it apologized for asking what he felt was ...