Regarding the PE Mod, if you are a pretty handy person you can do most of the job and probably bring the muffler in any welding shop which could save you some good money.
I cut the axle back portion from the car, dropped it and then I cut it open and removed the perforated pipe and resonator. I have a 240V MIG Welder at home but I did not trust my terrible skills for that kind of job so I had my father's friend weld my 2.5" piping.
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TOTALED | 2011 E90 335i xDrive - BMS Cold Air Intake - ETS Charge Pipe - ETS 7" FMIC - MHD Stage 2+ - GFB DV+ - PE Mod - VRSF Catless Downpipe - xDelete - xHP Stage 3
2015 E84 X1 35i M-Sport
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