My new 6.2

[Montana6.2]

Hey guys, I am really new to the forum scene but I figured you guys would be able to help out with some ideas for my new truck! I just bought a 2012 gmc Sierra with the max trailering package with a 6.2L V8 and 3.73 gears. I plan on leveling it and fabing my own exhaust and 285 tires with pro comp 7036 series wheels. The only reason I am fabing my own exhaust is I cannot find what I want that will not cost an arm and a leg. So does anyone know of an exhaust system that will bolt in???

Also I am a car salesman so voiding the warranty isn't a concern

 

[Heard]

Car salesmen can get away with adding performance parts that can cause the warranty to void?? Do explain... I would love to program my 2012 Sierra but do not want to void the warranty.