i might disagree with the rpm tru trac kit and go with the adjustible rpm arms in the rear, reason i say this is because i got them on my max and my buddy looked at them and said the wheels arent straight and low and behold they are actually toed in a slight bit, might not matter to most but it might affect handling or the way the power goes to the ground, just my 2 cents.
and for since I'm here ill add to the jumping topic, deff buy rpm parts all around and some decent shocks that arent too stiff with good travel, and honestly just expect things to break while jumping unless you have a good ramp and a landing available, I've been beating mine up lately and things are just breaking left and right and screws will loosen up and often just a heads up.