This discussion goes back a few years.

For some of you who are new to this forum most people did not go to stage 1 because of increased horsepower/torque performance expectations but to make the engine run better. With my original stock exhausts they were so restrictive the header pipes would glow red after driving for awhile and the engine would run rougher with more vibrations created throughout the vehicle. This was substantially improved going to stage 1. And yes there is a modest horsepower/torque enhancement.

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