Shop Late Model Restoration for the best selection of S550 seats and upholstery! The cloth factory seats left a lot to be desired. Now you can upgrade those seats with high quality leather seat upholstery from Katzkin! These seat upholstery kits are designed to transform the look and feel of your interior! These seats improve comfort over the factory seats for a more enjoyable ride. Shop our selection of 2015-2020 Mustang seats and upholstery below!