Rawze.com: Rawze's ISX Technical Discussion and more

It's about time to do the exhaust on the truck. It's got more patches and band clamps than there is pipe just about. Is there a better pipe size to go with, if I have the choice? Any recommendations on mufflers? I'd like it a little louder but definitely not straight pipe loud.
Is stainless exhaust worth the investment?

I personally don't see a cost to benefit improvement in stainless. As far as mufflers, when I owned a pre emission engine I took the baffled muffler and put a straight through muffler on. It resembled a glass pack inside. No baffles but a lot of noise catchers lining the inside. Had a nice pop with engine brake on and fairly quiet on acceleration.

If your looking for efficiency gains, wrapping the exhaust will help the most.