Haveny put mine on yet, but i've heard nothing but good things about thorely headers (not sure is i spelled that right) i did hack off the stock muffler, and put on a thrush "welded" muffler, and it tucks up really tight so i have better clearence than stock, and at an idle sounds very rumbley but is suprizingly quiet on the road/highway too. the headers may make it a bit louder tho. i did notice a tad bit better throttle response on the mid-top end (with the butt dyno) but more or less just sounds healthier (so well worth the 60 bones i spent on mufle/pipe/welding supplies.