Fabspeed
BMWM750-
I've had the Fabspeed setup for about 4 months and use the car on the weekend. To my ears the exhaust does not exhibit any resonance or drone. It is certainly louder (especially at WOT) and it sounds like a tuned sports car. In some respects if I could tweak it I would make it slightly louder and a little nastier. The system does fit well with a mildly modified street car though.
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