Flowmaster 15937 U-Fit Dual KitExhaust System Kit U Fit Dual Kit U Fit Dual Kit; Dual; Split Dual Exit; 3. 0 in. Dia.; 16 pc.; Universal; Aluminized Steel; SPECIFICATIONS: Automotive Item Grade: High Performance Color: Gray Exhaust Pipe Wall Max Gauge: 16 Exhaust Type: Dual Exit Position: Split Dual Exit Style: Straight Inlet Inside Diameter: 3. 000 in. Material: Aluminized Steel Mount Type: Uses New Hangers (Not Included) Muffler Body Length: No Muffler Outlet Outside Diameter: 3.