Borla Axle-Back Exhaust Systems replace your mufflers, rear piping and tips. While this type of system does not give you quite the same full-bodied sound as a Cat-Back exhaust, it is a more affordable solution that still gives you a distinct Borla sound note, with plenty of aggressive punch. Borla Axle-Back systems are available in their ATAK (most aggressive sound levels), S-Type (medium exhaust note) and Touring (quietest, smoothest Borla exhaust note) sound technologies, allowing you to customize your ride with your preference of exhaust volume and character.