Muffler delete is no good on the F10. I had a vrsf DP with a muffler delete and it sounded cheap. I ended up removing the DP and putting a straight through with j pipes and it got tolerable. The only decent setup I've heard through a video is the armytrix exhaust.
Also also ask
FenixMike as he has done this mod recently.
http://f10.5post.com/forums/showthread.php?t=1147883
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