This is my 2016 Silverado Z 71 Crew Cab, I haven't done a lot, just tinted windows very dark, added weather tech splash guards, cut out the muffler and flapper, I left the factory resonator and added a bigger black exhaust tip. Sounds just like a Magna Flow with out the expense, LOL. Aso have a spray in liner from ArmourThane, Replace crappy factory tiny tires with a couple sizes bigger and meatier Coopers