07.5 Duramax Performance Mods

[HDguy]

Hey, I'm sure this question has been asked before, so I apologize in advance, but here goes anyway.

I have been away from the forum since I traded off my 03 HD 8.1 and went to the dark side with a Dodge, but recently picked up an 07.5 GMC with 6000 miles that the sales manager had been driving since June 07.

Has anyone done any performance mods to these trucks? I know there is a warranty issue with the particulate filter, but can you put on a free flow muffler?

Has anyone got a tuner or chip for these trucks?

This is a great truck, but after seeing the difference that an intake, exhaust, and Bully Dog made on my Dodge, I am curious if there is more possible.

Thanks

[jfk]

we did the quadzilla stealth 2, Magnaflow filter back with muffler delete pipe, Edge insight and it has been working great so far, There are a few guys taking the dpf off and then you need to have a tuner to get rid of the codes