For Use With 5.7L HEMI Engine; Long Tube Chassis Exit; 1-7/8 Inch Diameter Primary Tubes; With 3 Inch Diameter JBA Firecone ® Merged Collectors; 3/8 Inch Thick Head Flange; For Off-Road Racing Use Only; 304 Natural Stainless Steel; With Gaskets/ Headers/ Oxygen Sensor Wiring Harness Extensions