How do those baily BpV sound?
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#9
WEll that's a loaded question..
See the Bosch System likes BPV since the air is premeasured by the maf, venting this air could result in rich condition. Other systems don't mind venting the air since they may use MAP or other air measure system. The S4 will bitch and go rich when using BOV, however some have claimed to find a nice comprimise between sound and not triggering a fault code. Whatever if it were me I'd stick with what was engineered in and use uprated bypass valves, since farting is best left to taco bell and quiffing is best left to....