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      08-24-2011, 06:35 PM   #23
f32458
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Drives: E90 M3
Join Date: Jul 2011
Location: Santa Monica

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If I get the F1 or Full exhaust system.
1. It is quieter or near no exhaust note than stock while valve is closed? I can only hear M3's beautiful engine noise?
2. valve open, I loose torque/hp?
3. valve close, I gain torque/hp?
4. auto mode, it is quieter than than stock after reach certain RPM, It will get super loud like night and day difference?

Thanks!!