I have a 2015 M3W. The exhaust note on the right has never been as robust as the left as previously described. This has remained even with stage 2 cams, new cam belt, stage 2 ECU, Morgan Aero Racing Stage 1 exhaust pipes, and removing the anterior baffle and modifying the posterior baffle of the stock pipes. I too wondered what was wrong with my M3W when I noticed this. Now believe it must be a consequence of some engine design characteristic.
Last edited by Sportster; 29/01/22 02:49 PM.
2015 M3W, Morgan Aero Racing Stage 1, Garage 56 Stage 2, sport black, saddle tan, jeweled SS dash.
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