Planted Seat Bracket - MAZDA RX7 (1986-1991)7 10 day build time Planted Seat Bracket Mazda RX7 (1986 1991) The Planted Seat Bracket is a vehicle specific bracket used as an adapter between the floor of the vehicle and an aftermarket seat and it's accessories. Because the floor of each vehicle varies and typically is not flat, a vehicle specific Seat Bracket is required for installing an aftermarket seat. We create each seat bracket using the floor of the vehicle as a reference. We literally