KIRKEY RACING DELUXE CONTAINMENT SEAT KIT. Commonly used in Stockcar and SuperStock Racing. 15 degree layback. Accommodates all head and neck restraint systems. Accommodates both five and six point belts. Reinforced vertically adjustable head restraint with SFI 45.2 high-impact padding. Pre-punched shoulder mounting locations for easy installation. Contoured extended bottom to support lower back, hips, and thighs. No square corners on bottom. Molded rubber inserts for lap and sub belt openings. Contoured bottom foam on cover has built-in leg separator for high g-force cornering support. Available in four (5) sizes 14″, 15″, 16″, 17″ and 18″. 15 degree layback.