"These days, almost never," proclaims Billy Godbold, Comp Performance Group Valvetrain Engineering Group Manager. For sure, anytime you can reduce the mass of the valves, valvesprings, valve locks, ...

Performance tricks are usually just sleight-of-hand changes that dolittle to improve performance. After all, if it was that easy, everyonewould be doing it, right? But the simple fact is, valvespring ...

For many years camshaft technology was limited not by any lack of knowledge on the part of lobe profilers but by valvespring technology that just wasn't up to stabilizing aggressive lobe designs. But ...