anybody know if there is a flow differance between the newer V6 cat and the 91 4cyl cat? im sure there is. would it be worth it to swap teh cats out? the reason im asking is im getting ready to have an exhasut made. 2.5 in piping from teh exhaust manifold back. im in tennessee and where i live there is no emissions and no cat laws. so i was wondering if it would make a differance to swap them out or just get rid of the cat all together. im leading the piping into a N1 style muffler. thx

Toddy