I spent money on these bags to save money at the dealer. They're easy to install, but the o-rings and plastic retainer that holds the pouch are unnecessary. I had an air leak in both bags and no matter what I did I couldn't stop the leak. I finally took it to my mechanic and they had it for over 24 hours and a couple packs of o-rings, $400 later and they were able to stop the air leak.