Quote:
Originally Posted by Nate@IND
Thanks guys! That's 100% correct. The Sport performance has perforated piping. Its very easy to tell the difference between the two. The pinched piping came out at a later date once Eisenmann tested the system on a E93 M3.
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Guess I have a collector's item with the non-pinched pipe! Probably good for .03 HP more!