Mustang 1987-1989 GT Convertible Front & Rear Seat Set - Interlude Cloth Inserts/vinyl trim All upholstery sets are made following the original pleat pattern, the sewing pattern and factory attachment points. The upholstered seat sets are offered in vinyl, velour or a combination. All upholstery seat sets are the perfect replacement because they are not just covers – they are actual replacements for the existing covers. Just slip the old ones off and slip these brand new ones on. All sets come with complete instructions and we even furnish the hog rings and pliers to do the job. These are the perfect replacement covers that will make your vehicle feel and look “New” and “Fresh” again.