For Use With 283-400 CID Chevy Small Block Engine Swap; Chassis Exit; 1-1/2 Inch Diameter Primary Tube; 2-1/2 Inch Diameter Collector; 3/8 Inch Thick Head Flange/ Oval Port; For Off-Road Use Only; Black Maxx Ceramic Coated Mild Steel; With Mounting Hardware/ Gasket And Reducer