[SilverDropTop]

I had the mufflex 4" with spintech muffler and dual 3" exits on my old 00' SS paired up with hooker long tubes and ORY pipe made by mufflex. The car sounded like a beast. I had at the time the Catrek 3X head and cam package. My car dynoed 418 rwhp and 389 rwtq and the guys were like WTF? We removed the mufflex 4" and replaced it with a TSP rumblex exhaust (very similar to SLP LM1). The rwhp jumped to 460 and the rwtq jumped to 418. The fit of the exhaust was awesome but I gained 42 rwhp and 29 rwtq after removing it. I highly recommend them as they do incredible work, I just don't want you to have the same issue I had.