9-Piece Exhaust Kit for Select 1987-1990 YJ Wrangler w/ 4.2L Engine Crown Automotive9 Piece Exhaust Kit for Select 1987 1990 YJ Wrangler w 4. 2L Engine, Includes Front Pipe, Catalytic Converter, Muffler, Tailpipe, Clamps, and Insulators Features and Benefits: 12 Month Warranty 4. 2L Engine Direct Replacement Includes Front Pipe, Catalytic Converter, Muffler, Tailpipe, Clamps, and Insulator Details: Material: Steel, Rubber Finish: Unpainted Location: Front & Rear Hardware Included: Included & Use Existing Hardware Application: 1987