The Baja SS was our original suspension seat. Our expertise on seat comfort and our experience with performance seats is what makes the Baja SS Off-Road Seat one of the most advanced suspension seats on the market today. The Baja SS has four vertical tabs on the bottom of the seat allowing it to bolt to a roll cage. If you plan on bolting to a Corbeau bracket or a flat mounting surface, you'll need to order a Baja Adapter (A22002F), which bolts to the bottom of the seat making it a flat mounting surface and eliminating the vertical tabs.