It is the model number 11225 14/9 offcenter in center out., for a tip just cut a down angle on a pipe and welded it on, since this is a arc and the exhaust doesn't come through a cut / well in the rear. I do have the resonator still installed. I like it real quiet when cruising. It feels like the expanded flow has upped my horsepower a bit but that might be wishfull thing. The guys at magnaflow claim 20hp boost :nono;. I doubt it. But for a wideopen ( you can see straight thru it ) it still has a tame note.