NOS Go Kart Cart Wiseco Forged Piston 1978P3 on box, Super Stock Chromed A62F8 030 1978(stamped on piston top), Briggs Racing Flathead 5HP.  Please research and make sure it's what you need. Never used. Packaging has shelf wear. Has piston, pin, and clips, no rings. Comes with what you see in the picture, no more, no less. Please see my other auctions for more race Briggs parts from same stash.