I have a Mazdaspeed 6 and I love the sound of a BOV. What does this do to the car? Is there any increase in performance or even potential harm that can be done to the car?
A blow off valve is, well, a valve that lets the boost created by the turbo escape. This dumps boost when the throttle abruptly is taken out or the engine is run to fuel cutoff point.
A blowoff valve is not helpful nor harmful to performance, but you still need one. It just sounds cool.
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