Well what type of sound are you going for? The old school muscle car sound? the harley davidson sound? and to answer your question there are 3 cats on the edge. I removed the one that's connected to the headers/exhaust manifolds on mine that helped alot but mine won't pass emissions now either. The ultimate thing you can do is get a camshaft from morranav6racing.com and 1:6.2 roller lifters from underdog performance or rogue performance. and if you're going to do that you might as well do a V8 swap.