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Very interesting. I look forward to hearing some reviews on this... I had installed the Borla catback a while ago and it was just way too loud and abnoxious with the DP.... I was literally just about to install a cutout with electric valve but now my wheels are turning again...
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2013 F30 335i ///M-Sport
Forgestar/Challenge/BMS JB4
Wagner/Evo Race/M-Performance
2016 F15 50i ///M-Sport
BM3/H&R/Borla
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