Quote:
Originally Posted by rsjean
I'll tackle "Diverter Valve".
Diverter valve: A vacuum-operated valve in an air-injection system that directs air-pump output to the intake(bypass valve; BPV) or atmosphere(blow-off valve; BOV) during high-vacuum deceleration to eliminate backfiring.
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So what does that mean for performance? Why do so many people replace theirs? And is this the thing that a lot of Evo owners have that makes that obnoxious pssshhhh sound?