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Thats why you start in second. lol anyways, x pipes will vary in sound when compared to the different styles that are made and the type of metal they are made of. Stainless steel supposedly is not as raspy as aluminized steel. Just a thought that i cannot back up, but have heard before. But here is the breakdown...BBK/Bassani style x pipes will sound relatively the same. VRS/Dr. Gas/ UPR/Pypes/SLP x pipes will sound basically the same. And then you have mangaflow in a class al by itself. lol I prefer the sound of the magnaflow x pipes as they are the least raspy, followed by the pypes/slp version, followed by the bbk/bassani version from my understanding/experience. Anything with an o/r x pipe is going to be raspy, lets just face it. But not all rasp sounds the same.