Agree with 2Sharp.

I have a 2015 M3W. With the original air filter and exhaust the engine got too hot after awhile and ran rough.

I installed Morgan Aero Racing Stage 1 higher flow exhausts and S&S Stealth high flow air filter. My engine did not get as hot as evidenced by lack of glowing red header pipes and definitely ran better.

I purchased Stage 2 cams and recalibrated ECU from Garage 56. Installed by our local S&S Dealer. Really makes the M3W more driveable. More lower rpm torque. Do not have to downshift as much. Opens up the rpm range in each gear. Very happy with going to Stage 2. Before ordering I called Garage 56 to ask if their recalibrated ECU is compatible with the Morgan Aero Racing Stage 1 and they confirmed it is. I totally agree.

Highly recommend Stage 1 and Stage 2 upgrades.

2015 M3W, Morgan Aero Racing Stage 1, Garage 56 Stage 2, sport black, saddle tan, jeweled SS dash.