SKI-DOO HITCH REAR BUMPER FOR SUPER SHORT TUNNEL 165 - 860203053The Ski Doo Hitch Rear Bumper for the super short tunnel 165'' is a required frame component for REV Gen5 Deep Snow riders who want to tow or run a hitch mounted rack. Without it, hitch use simply isn't possible on this tunnel configuration. Installation is straightforward and reliable because it bolts on without any cutting or permanent modification to your sled. It's a functional part that also stiffens up the rear of your tunnel while it's back