I have a 99 tj just picked it up fri. It has a 4 inch pro comp lift with 33's i know i need to switch the steering arms for aftermarket ones to help with the wobble but i am in need of a tune up i believe?? The stock filter is a two piece ?? Foam and paper ?? Thinking about switching it to a k\n or a airaid. What about spark plugs and wires what are the best to use or does it make a dif? And does fuel cleaner work ?