THE 3DV TRIPLE DUTY VALVE includes a calibrated balance valve, a spring loaded check valve and a shut-off valve — all the valves needed to balance systems for smaller pump applications. It is ...

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 ...