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So I'm going to be doing this mod, it's similar to what I did with my Cayenne Turbo stock exhaust mod I did and recently purchasing the M3 I had this in mind already just glad to see others have taken the stride in doing this.
I'm going a different route though, I'm completely removing all the bends and opening the entire exhaust up and going to block off the center completely so that my design will be just like dinan's muffler design. I'm just debating on putting in the resonated pipe into the outside parts and restuffing the muffler or not, I may just go straight pipe from the muffler inlet to the outlet / tips.
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