Bars dont add power but traction they do. If a guy has bars on his rig he must be trying to plant some kinda power to the ground. It makes a more level playing feild for a class where the cheaters like to hide! <500hp trucks should not breaking stuff unless stupitidy is involved!
You don't need lots of power to have axle wrap. Stock trucks will wrap an axle. And yes, < 500hp trucks break plenty of parts, if not more.