The 18" wide driver seat is 1" lower than stock, sits the driver back 1" and also accepts a fully adjustable and easily removable driver backrest (79904, sold separately). The nose of the seat is narrower than stock so the driver can easily plant his or her feet on the ground. The passenger seat is a full 18.5" wide with a bucketed shape to eliminate sliding forward. The Passenger Backrest features Mustang's unique "comfort wedge" that angles the passenger's upper back 2" more forward than stock for more vertical back support.