Bbk Performance Headers - Shorty - 1.625 in Primary - 3 in Collector - Gaskets / Hardware Included - Steel - Titanium Ceramic - Small Block Chevy - GM Fullsize Truck 1996-99 - Pair-4007--Notes: 1-5/8 Dia. Shorty Style State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO