I am personally a fan of flo masters! I like the sound of stock manifolds, and a 3" dual exhaust! Run an H pipe to give it a nice even sound. Id also run the pipes clear out the back, less cab noise, and less smell of exhaust in cab as well. I ran mine out the rear corners at an angle, vs my freind who ran it straight out the back and the cab always smells like exhaust!
just my 2 cents
DMNCLNR