An X-Pipe will make the car a bit more raspy/higher pitched, its hard to explain over text but that is the best way I can put it. I would say 3 out of 4 customers choose an H-Pipe which is what the car comes with from the factory. Technically speaking, an X-Pipe will produce about 5 more ft. lbs. which is very hard to even measure pull after pull. So if you are looking to squeeze every inch of HP out of the car then go with the X. They still sound good!