i have an '02 silverado 6.0L Vortec, already done the cold air intake, superchips programmer, and true full length duel 2.5" exhaust. Looking at getting headers, was wondering what else i could do to get more mileage and towing power. And i know i should have a duramax, but it's not in the budget for another couple years.

 

Long tube headers if you are looking to go headers, don't waste your money on shorty headers since they don't flow much better than the factory manifolds. Get a reputable custom tuner and toss out you hand held programmer, you will be surprised at the difference.

 

cam, diablo tuners let you remove the cats (if you dont have restrictions)

 

second the longtime headers and a custom tune and maybe the off road y-pipe to get rid of the cats...the cam will be a huge boost dependin on how much power you're lookin to get

 

I don't believe that Diablo's will get you deep enough into the system to do a cat delete. You would need a better programming software like HPTuners or EFI Live. I paid about $500 for EFI Live V1 software so that should give you a little bit of an idea of cost. If you were to get a custom tune, some of the tuners will do a rear O2 sensor delete for you in the tune.

 

yes it does, my good friend has a charger with no cats and a diablo tuner, all works fine

 

Well that's good to here. I had just heard differently, I can't speak from direct experience only what I had heard on the Diablo.