My specs are: 88' V10, 350 ci TBI, 700R4, G. Ratio unknown, but basically stock all around 1/2 ton w/tow package. I am not looking for serious performance, but needed upgrades because of exhaust replacement due to age and corrosion. I have a noticeable exhaust least on the stock manifold on the left bank. I had the cat gutted recently and replaced stock muffler. My system had the custom appllication mentioned earlier with both exhaust manifolds crossing into one 3" pipe-cat-muffler w/2 out and tailpipes on both sides. The pass side tailpipe was history so I replaced muffler w/ one out and eliminated the one side altogether. I dont plan on going too far in the performance range with the existing engine, just want to upgrade to dual exhaust since I have to replace it all anyway and possibly change stock cam, springs, lifters for a 1 step upgrade for some new life and slightly better low end.