Borla 140433 Touring Cat-Back Exhaust System Fits 11-15 CTSExhaust System Kit Touring Cat Back Exhaust System Touring Cat Back Exhaust System; 2. 5 in.; Incl. Connecting Pipes Mufflers Hardware 4. 5 in. x 5. 75 in. Dual Round Rolled Angle Cut Tips; Dual Center Rear Exit; SPECIFICATIONS: Exhaust Type: Dual Exit Position: Split Rear Exit Style: Straight Inlet Inside Diameter: 2. 250 in. Material: T 304 Stainless Steel Muffler Type: Turbo Outlet Outside Diameter: 2. 250 in. System Type: Cat Back Tail Pipe