Quote:
Originally Posted by DCNISMO
I can hear the swooshing sound when I accelerate kind of like hearing it take a deep breath. I'm getting a tune Friday and will post results.
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They are very quiet if you have the bypass valves installed. Take those out and it instantly becomes more throaty and about 10 times as loud.
The valves act like a resonator of sorts to break up the howl, barely any louder than stock except at very high RPM and WOT.