Cat-Back Exhaust System - ATAK®This 3" diameter True Dual Borla(r) Cat Back(tm) system features a merge X Pipe for increased performance and improved sound. This exhaust system contains active valves that retain the Active Exhaust functionality. Muffler contains Polyphonic Harmonizer technology which utilizes patented units that contain pipes of different diameters and lengths to create multiple exhaust notes that harmonize to deliver a clean, rich, full bodied sound. It features