This is exactly the muffler my Ripsaw ported 572xp needed, no wonder why the wait was long. The ripsaw boys hit a homerun with this muffler. ive tried a few different mufflers and even a pipe on my 572 and this ripsaw muffler is by far my favorite sounding and performing muffler. It gives my 572 a great gain in power and torque without too much of a obnoxious tone, it wakes up the 572 big time!!!
