the effect of the bypass pipes on sound largely depends on your muffler. with a reasonable muffler, the sound is deeper & more throaty. in my car, which has a race muffler and no sound deadening, the exhaust is MUCH louder with the bypass pipes; more like a cup car.
that having been said, i have an extra set of brand new T304 stainless bypass pipes i'd be willing to part with. caveat: they are designed to work with mufflers that have a larger 2" inlet rather than 1.75" like OEM. i will post a pic later.
PM me if you want them; they could be necked down like the fabspeed pipes pretty easily. $300 for the pair.
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