Kirkey 65 Series Adjustable Road Race Seat Kits are made for use in kit cars, club racing and drag racing applications; and contain a unique bottom design with layback angles ranging from 18 to 23 degrees. These versatile seats are offered in 15", 16", 17" and 18.5" hip widths; with the 18.5" seat providing a longer bottom with sub and lap belt openings moved forward, rear belt opening, along with rib and shoulder supports that are raised for additional adjustment for larger drivers. Seat kits come complete with a seat cover that accommodates leg supports (570-02100 and 570-02200) sold separately.