When installing a Trailmax II front seat in your 2003-2006 Wrangler, a Seat Slider/Adapter unit is required to properly mount the seat. Available separately for a driver-side or passenger-side seat, these adapters give you the added bonus of much greater seat travel than your factory seat had - up to 6 inches more! If you're installing two seats, you'll need both the driver and passenger side adapters.