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I have an ER catless DP and Remus axle back, along with stock midpipe (two OEM resonators). It sounds sick. I have the valve disabled, and honestly, it's still not that loud until I get on it in Sport +. Zero drone as well.
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2017 M240i/ ZF8 Pure Drivetrain Solutions Stage 1 & torque converter/xHP/ DAW Ultra Flow/ DS2/ Nostrum injectors/ E40 Doug Newton tuned/ ER DP/ Remus axle back/ BMS intake/ FTP CP/ M Perf LSD
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