I don't want to change the fuel tank to the later style. I don't plan any major engine mods either. I just want something a little better than stock. I will be dropping the exhaust system to replace my fuel pump and figured this would be a perfect time to upgrade. It still has all the original exhaust and it seems to be in good shape. Summit Racing sells a Flowmaster resonator and separate cat-back system. I'm not sure if their website has the right description for the resonator though. It says "Muffler, Force II, 2 in. Inlet/Dual 2 in. Outlet, Aluminized Steel, Each" and is required for the cat-back system which is all 2 1/4". Uh? They also have MagnaFlow replacement cats with 2" pipes. Anyway, none of that seems much better than stock. What else is available?