Gibson Performance 619003 Cat-Back Dual Split Exhaust System Fits 99-04 MustangExhaust System Kit Cat Back Dual Split Exhaust System Cat Back Dual Split Exhaust System; Stainless; 2. 5in. Tubing; 4x9x13in. Oval Body; 2. 5in. Offset In Outlet; 4in. Double Wall Slash Cut Tip; Exit Straight Out Back; SPECIFICATIONS: Exhaust Type: Dual Exit Position: Dual Split Rear Exit Style: Straight Inlet Inside Diameter: 2. 500 in. Material: Stainless Steel Muffler Body Length: 13. 000 in. Muffler Type: Chambered Outlet Outside Diameter: 2. 500