Planted Seat Bracket - BMW M6 COUPE [E63 CHASSIS] (2005-2010)7 10 day build time Planted Seat Bracket BMW M6 Coupe [E63 Chassis] (2005 2010) 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.