Pontiac's Super Duty 4-cylinder engine has established a formidable success record across a broad spectrum of motorsports competition. It has become the dominant powerplant in NASCAR's ...

Adjusting valve clearances is simple, right? They can be, as long as you follow what Honda has to say about them. If there's one thing Honda says to do when it comes to adjusting those valves, it's to ...

Word of a DOHC LS conversion was spreading all over the 2014 SEMA show. Even in the booth next to Mercury's proprietary DOHC V8 with big-block proportions, the 4-valve LS heads were drawing a crowd.