05-26-2012, 01:40 PM
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#17 (permalink)
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Base Member
Join Date: May 2012
Location: Minnesota
Posts: 50
Drives: 2012 370z Nismo
Rep Power: 15
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Quote:
Originally Posted by Sh0velMan
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.
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What do the bypass valves do in these? Protection from water?
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