Actually vary strong. The bike that the kit came from hit something hard enough to snap the left axle and bend the tube on the rear end. The portion that is welded to the stock swing arm has no damage (2X2X1/4). The stock portion bent just a little. I was surprised.
Question on the on board compressor: Adding two six inch air bags instead of the factory type progressive shocks. Wondering if the on board compressor will work with the air bags. one of the shocks rolled over and oil came out where the line connects to it ????