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      03-11-2010, 08:13 AM   #4
Skywagon
Private First Class
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Drives: X6 3.5
Join Date: Jun 2009
Location: The Old South

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eg3 is correct. I've installed the Supersprint street muffler. Not cheap, about $2500. for the muffler and exhaust pipes. Good news was no cutting was required for the tips. They claim 7HP gain. Bad news was it barely made any difference in the sound so I chopped off the resonator too. It is a straight through, small one but it's removal added just enough of a tone to the car. I have pictures of the install if anyone wants to see just send me your e-mail via PM.
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