Gibson Performance 17405 Cat-Back Dual Exhaust System Fits Grand Cherokee (WK)Exhaust System Kit Cat Back Dual Exhaust System Cat Back Dual Exhaust System; Aluminized; 3in. Tubing; 4x9x18in. Oval Body; 3in. Dual In 3in. Dual Outlet; L 24in.; 4in. Polished Slash Cut Tip; Exit Straight Out The Back; SPECIFICATIONS: Exhaust Type: Dual Exit Position: Dual Rear Exit Style: Straight Inlet Inside Diameter: 3. 000 in. Material: Aluminized Muffler Body Length: 24. 000 in. Muffler Type: Chambered Outlet Outside Diameter: 4. 000 in.