The modern stock car racing engine is a product of two very interesting, and normally competing, dynamics. First, there are the rules. Aimed at providing safety, cost containment, and a level playing ...

Engine performance is like a complicated formula in which each individual part plays a role in the final answer. Some parts of the formula affect the final outcome more than others. The valvetrain ...

Changing the rocker arms in your C5 or C6 Corvette may not deliver the dramatic results that a cam swap can, but it's a lot less work. And the power increases you'll experience make the change a good ...