The MINI Cooper S R56/R57 Borla S-Trim exhaust has all the benefits of the standard exhaust, such as full T-304 aircraft quality stainless steel with mandrel bent piping for the best possible flow. The main difference between the two systems is smaller mufflers with less baffling for higher exhaust flow and a more aggressive sound. This system will be drastically louder than the standard system. Like any Borla product this system features their million mile warranty as well.