Corsa Performance 14328 Xtreme Cat-Back Exhaust System Fits 15-17 MustangExhaust System Kit Xtreme Cat Back Exhaust System Xtreme Cat Back Exhaust System; Dual Rear Exit; 3 in. Dia.; Incl. RH LF Muffler Assy X Pipe Assy 4. 5 in. Polished Pro Series Tips; SPECIFICATIONS: Exhaust Type: Cat Back Exit Position: Dual Rear Exit Style: Straight Inlet Inside Diameter: 3. 000 in. Material: Stainless Steel Muffler Type: Chambered Outlet Outside Diameter: 3. 000 in. System Type: Cat Back Tail Pipe Diameter: 3. 000 in. Tail Pipe