hello, i have an 03 toyota 4runner sport V8 4WD and i am looking to upgrade some different things. First thing i will replace is the exhaust. I was thinking of doing a magnaflow catback system. My friend has this exhaust and i like how it sounds. Let me know if this is a bad choice. Next is wheels/tires. I want to go to a black off-road wheel with terra graplers or something along those lines. I wanted to go 20's but i wasnt sure if I could go with them without a lift. If not i will go with 18's. I just do not want to do a lift. So my question is do i need a lift to go with the 20's and terra graplers? or Should i just stick with 18's?