Hepfner Racing Products is a leader in the design and manufacturing of sprint car wings. CNC punched and formed, each wing is identical and all internal components are formed and lightened. Top wing is made of . 020" thick aluminum with 4130 posts and CNC-punched recessed rivets. Wicker included. NOTE: Ships by truck freight only. Side Boards and supports must be installed by customer.Pit Stop USA offers HRP Flat Sprint Car Top Wing w/ Recessed Rivets / Standard Boards - 2" Lead FLT0510 at low everyday prices. Be sure to check out all of our products from Hepfner Racing Products including Hepfner Racing Products Top Wings and HRP Top Wings.