depends what you want to 'hop up'
i hopped my original Monster GT up with everything all blue alloy....biggest mistake i ever made to be honest. if you have a crash, then the arms will rip the mount from the chassis and you may need to buy a new chassis like i did. not only that, but it makes the truck heavier and slower. mine is back to stock parts now, and to be honest, ive never broken a stock arm etc since ive had it.