Those wound-up pieces of high-tensile steel under your rocker arms work so hard closing your valves over millions of cycles that they could probably use a replacement right about now. We're talking ...

Performing a quick check of your valvespring pressures is a simple and easy procedure. The good news is-if you aren't doing it already-checking your spring pressures weekly (or at least after every ...

Performance is all about pushing the envelope. As camshafts become more aggressive in the search for more power, these lobes make life increasingly difficult for valvesprings. This may seem like a ...