Any Chevy engine, if it's well-modified or just slightly warmed-over, requires a good set of valve seals. Originally, a small rubber O-ring, fitted in the second valve stem groove, served as the only ...

For mild street engines, stock valve springs are more than adequate. But if you've screwed in a big bumpstick for strip-banging or banzai runnin', then pay attention. Our plan was simple: Install a ...

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 ...