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Hello all, just got an 04 6.0 I have a banks monster exaust with the cat installed I just installed a bullydog set on tow/economy will this effect long term duribility? It has helped my fuel mileage 15.84 last tank in town driving. I just changed the oil to Royal Purple 15w40 will any of this affect the warranty? Thanks for the help.
Depends...
I have an 05 with Banks Big Hoss Package. It has been in and out of the dealerships for service and nobody has said a word as far a warranty goes.
It depends how much of a pain in the a** your dealer wants to be.
I did hear that bullydog can make your truck run lean, so watch your EGTs.
I got 16-17 running 75mph down the highway with my stock 6.0 and now its 15-16 on the highway at 75mph running Spartans ultra comp tune. I just wish I could keep my foot out of it and slow er down to get even better but its way too much fun to drive!!