The slings on the tips are just ground straps to reduce radio interference. I have only seen them on CVPI's I pulled a whole dual exhaust with mufflers, h-pipe, and tail pipes from a junkyard car, used all of the car's brackets and rubber isolators, they were all good. Holding up a year and a half later since I installed the bunch. I dropped the axle in the junkyard car because I was not sure where to cut the exhaust, but at home I figured I could cut it right after the mufflers and welded it in place on my car, did not drop my axle to get it installed.