For the guys that wanted to know how the 6 speed exhaust sounds on the auto cars I did it. It does have a better sound to it in the whole RPM range. There is no drone at all ACCEPT when the MDS kicks in. Its not a bad drone at all but it is louder than the auto exhaust. Its not bad enough to take the exhaust back off. The 6 speed exhaust is 2.5 inch pipe which is bigger than the 2.25 inch auto pipe. With the seat of the pants dyno I cant tell any differance but I can almost guarantee there is a gain by putting it on. It only took about 10 minutes to change it out since it is a direct bolt on factory part.