oops my bad on the 60mm comment. but i did find out from mike at road race that the piping is 3 but the muffler goes down to like 2.5 or something like that. so would there be much differnce in have a 3 or 4 inch muffler compared to the 2.5 besides noise?
1997 Mitsubishi Eclipse GSX: K&N Filter, John Sheppard built transmission with GVR4 1st gear, autometer boost gauge, "free mods", Greddy type-s BOV, broken shifter