Bbk Performance Headers - Tuned Length Shorty - 1.75 in Primary - Stock Collector Flange - Gaskets / Hardware Included - Steel - Titanium Ceramic - GM LS-Series - GM Truck 1999-2013 - Pair-4006--Notes: CARB APPROVED C.A.R.B. number D-245-18 State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO