A Borla Cat-Back Exhaust System replaces your entire stock system from the catalytic converters "back” to the tips exiting the bumper. This type of system delivers the most dramatic upgrade in sound, because it includes improvements to virtually all the undercar piping, incorporating Borla’s ultra-smooth mandrel bends, X-Pipe technologies, pipe diameter specs and other characteristics that shape the sound. Borla Cat-Back systems are available for a wide variety of popular cars and trucks, and are offered in your choice of sound technologies — ATAK (most aggressive), S-Type (medium but still aggressive) and Touring (smoothest Borla Exhaust Note with lowest volume) — each with their own distinct volume and character.