really that kit isnt needed if ur exhaust is mounted correctly or if u dont have any cracks/leaks/opennings in ur exhaust. when my exhaust started to rattle on my way home from the car shop i drove back less than an hour later and when the guy rev'd my car u heard the rattle and sick sounding sound that came from it. he put it back up on the lift and checked the welds and there it was a hole they missed in welding my custom piping..