Quote:
Originally Posted by BimmerE82
I was just looking for the best price on the quad exhaust. I realize that a new rear diffuser is required.
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Just go with any I'd say. Most of them are purely cosmetic due to the piping restriction and not much if any exhaust gases will come out of the other side. So in the morning people behind you will see more hot smoke coming out of one side of your car than the other.
That's the only reason I haven't gone quad. There is no purpose or benefit other than it being purely cosmetic.