Inside an internal combustion engine is an intricate web of small tunnels or passageways that enable oil or coolant to flow, which helps keep everything lubricated and operating at the proper ...

Brian Cooley is CNET's Editor at large and has been with the brand since 1995. He currently focuses on electrification of vehicles but also follows the big trends in smart home, digital healthcare, 5G ...

Subaru nearly lost a generation of buyers over one fixable flaw.

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 ...

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Engineers tend to ask the kinds of questions nobody else has ever even dreamed of asking. I've never even remotely considered asking whether or not it would be possible to build a functional cylinder ...

Who needs soap operas when we've got racing? Mostly, the wild rumors, back-room dealings, and unsubstantiated gossip are confined to the team level at the tracks-who's running a ported head, who's ...

There was a “what-if” question addressed a few months ago in our Performance Q&A column that piqued our interest. The question was simple: If you had a set of iron and aluminum cylinder heads that ...

On average, a properly set-up engine can make about 2 horsepower for every 1 cfm of dry intake port airflow. However, that does not automatically translate to "bolt on better-flowing heads and make ...