Wheels/Tires>Gears, Exhaust, Intake, Warranty?

[carz80am]

As, I've been checking out past threads, it looks like everyone recommends gears. I'm planning on put on some 22's with 37 inch tires, but before I do, I wanted to do exhaust and intake. Also, I see that 37's will fit, but there may be minor rubbing. Recommend a leveling kit? I still want to have decent performace after putting on bigger wheels, so does everyone think gears, intake, and exhaust would be sufficient? Also, Is this stuff going to void the factory warranty?Any opinions would be appreciated. Thinking about buying one of those plows that go on the front tow hitch as well. I spent over $1500the last few days to pay someone else to plow, mine as well keep one around. Leveling kit, gears, exhaust, and intake brands that you've had good experience with? Thanks