I would only run with Banks full exhaust system, spendy but well worth it. I've over 60,000 miles on the headers put on in '01. Their muffler is awesome, not noisy but very throaty. The heavy stainless construction has not cracked and I use this truck, a lot in 4 wheel drive pulling a heavy goose trailer with my farm. I raise beef and am always moving animals or hay distances. They've done their home work and don't just bend tubes to fit any and all. more or less kinda if you know what I mean. Take a look @ their website: Banks Power | Diesel Performance and Gas Performance Products.