Lets assume that you are right, and that the muffler gives you no extra power. But then I bet that it is lighter than the stock one, thus less weight, and thus an advantage :wink:Frank said:I know. The Protege weighs 1,230KG, the Mazda3 is 1,530 I guess... That makes 300KG (600lbs?) for 40 more horsepower to the wheels.
And my Protege had only the muffler yes, but I don't think that the muffler will give any "real" gain in that type of Vehicle (except LOUD sound gain).