One of my friends has a youkon denai with the JBA shorties and the borla catback with a k&n intake and a tune. And he wants to mod it more but dont want to get inside the engine like doing cam swap or something like that .

We are out of mods an anyone tell me what can we install on it more.

and a quick question too he is askin can he make it 2wd rather than AWD by pulling a fuse or something?