I seem to have seen articles on these in US hot-rod magazines, basically they enable you to adjust wastegate (or blow off valve) to regulate the level of boost; useful for competition purposes, I ...

First gear, useless. Second gear? Well, let’s just say you better be holding that steering wheel straight when the boost hits. The noise can only be described as a tearing sound, as the tires just ...

There's more than one way to control boost on a turbocharged car. Some methods are more expensive than the turbo they're designed to control, others cost less than the burrito I had for lunch. There ...