You take your car in for an oil change. The work is almost done when the technician comes out to talk to you. Hes holding your air filter and PCV valve and recommending that you replace both ...

What more could you want in a high power PVC air cannon? You can check out the videos for this build – including a guide for the clever piston valve – below.

Separating the crankcase from the intake manifold, which is a source of varying air pressure, the PCV ... valve is an inexpensive, easily replaced example of the dozens of parts that can elicit a ...