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I run Flowtech-style headers on mine with dual 2.25" exhaust, H pipe and Dynomax Ultraflos exiting to 3x18" Magnaflow slash-cut tips that are at a 45 or so behind my rear tire. After I did the cam and head upgrade, my exhaust got a fair bit louder. The Ultraflos are nice and give a pretty classic performance muffler sound. They don't drone as much as a Flowmaster I had on a different truck years ago and really 'snap and rap' when accelerating hard above 3500 rpm. I want to try Hooker Aerochambers though if and when I eventually upgrade to a full 2.5" dual exhaust.