Are you sure you weren't just heat soaking? Turbo cars suffer more than N/A cars. Adding a downpipe does nothing to change the DME fuel cap. A more plausible scenario is that you're experiencing throttle closures on upshifts, which has been an issue on the B58 with catless DP's. Can you data log with the Dinan?
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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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