Originally Posted by stuhly
I have the 5050XL on my C7 cat. It is louder than the big garbage can muffler, but not exceptionally so. The 5050XL takes the sharp harsh tones out of the straight pipe. Power is better but fuel mileage not so much.
Well,,, you know what they say,,, its takes fuel to make power. Thats where the dyno numbers would be great. It would also show the AIR/FUEL ratio so we could compare.