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      01-02-2010, 12:03 PM   #8
Singletrack
4th down; 4th quarter? Renegade.
 
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Drives: 09 SSII E92 M3; 12 AW X5d
Join Date: Aug 2008
Location: Pittsburgh, PA

Posts: 3,795
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Sounds good, but I had that same buzz/resonance at/around 2k with the stock axle back mated to the fabspeed HFC+res/x-pipe. I was happy with everything else except how the car sounded at those low speeds/RPMs. In parking garages, it would almost sound a little farty and like a lower displacement engine - if that makes any sense. I went with the Akra slip-on and that eliminated it. The Akra also brought back a little bit of the mid-rpm staccato note of the exhaust which was lost with the above mentioned setup.
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