Kirkey's Lightweight Double Rib Support 20 Degree Layback is designed for the racer who wants to save weight but demands the ultimate in comfort and safety. Features: Strategically placed flared openings save weight and add strength . 081 thick 5052 grade aluminum, TIG welded outside and MIG welded inside for added strength. Contoured sides support hips and thighs along complete side of seat. Seat bottom shaped at rear to support tailbone and lower back. Center leg support holds inner things under heavy cornering forces. Aluminum extrusion around perimeter of seat adds strength and safety. Edge of seat is stepped and extrusion is offset to outside so inside of seat in completely smooth. Seat back is double crossbroke for added strength and safety. Headrest uses Kirkey's unique tubular rolled edge for added strength. Multi Position rubber edged lap belt openings for easy mounting. Double shoulder belt and sub belt openings are standard. Rib supports are reinforced with welded, lightweight flared band. Full covers or lightweight four piece modular design available. Extra thick, high density foam on rib support for added comfort and safety. Designed for Oval Track IMCA Modified All Dirt Late Models Short Track Late Models Asphalt MidgetsPit Stop USA offers Kirkey 58 Series Lightweight Layback Seat - 17" - (Cover Sold Separately) 58700LW at low everyday prices. Be sure to check out all of our products from Kirkey Racing Fabrication including Kirkey 58 Series Lightweight Seats.