Originally Posted by
2dogs
Have a 2Brothers muffler with their DB killer insert. Bought another (after market) baffle that fit the 2Bro's DB killer, cut that in half (shortened it) and installed it in front of the DB killer. So far sounds good to me, not too loud, get that little over lap sound on deceleration and no change in MPG, and performance otherwise seems about the same. Must have gotten it to just about the right amount of back pressure. Dropping the cat and swapping out the OEM muffler equals about taking about 50 lbs off the spyder.