What Olram30 said. There is NO need to replace your control arms unless you've installed a lift and even at that point, you don't really "need" to replace them. Certainly, you DO NOT want "longer" ones but rather, ones that are adjustable and can be made slightly longer. Depending on how high you go, you may only want to get adjustable front lower arms so that you can set your caster. In the rear, if you get a new drive shaft, you will need adjustable rear upper arms so that you can set your pinion angle. But, that's about all you will need.