We had our friends 2015 M5 in to play around for a little bit on the dyno.He installed a set of catless downpipes and had us do a stage 2 tune. The M5 baselined at 469WHP/433WTQ on our Dyno Dynamics dynamometer. After he installed catless downpipes and our stage 2 ecu tuning, the power went up to 556WHP/521WTQ.
Stock Baseline Dyno Pull
Stage 2 ECU Tune with Downpipes Dyno Pull