I just got a 1998 speed triple and was wondering what years are the body/exhaust are interchangeable? It has a race tail section that I would like to replace with the factory so I can ride a passenger. It still has the factory exhaust which has to go... I would like to get either a high mount or GP style to open up the rear tire. I don't know if back pressure problems would be there with a later year exhaust. Thanks for your help.