After months of exhaustive testing the team determined that the best design starts with a stainless steel flange precision tig welded to 2.5” tubes leading into a CNC bent and CNC machined X pipe. During the development the team tested a true dual exhaust system and determined that it was too loud and too “flat” sounding. Something very common with twin turbo V6 engines. However, in an effort to get the best performance possible we did not want to restrict the engine by going from dual 2.5” tubes to a single 3” mid-pipe. The perfect solution was an X pipe which offered a cross-sectional area of around 4”. This allowed the team to merge the left and right banks which improved the sound tremendously without restricting the exhaust flow. Additionally, it allowed the team to fit the largest possible collector through the narrow chassis tunnel in the center of the car.