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The JBA Cat4Ward header for 1965–1986 GM trucks (265–400 SBC, carbureted, with A.I.R., silver-coated) improves exhaust flow and engine efficiency over factory manifolds. Constructed from mandrel-bent stainless tubing with 3/8" machined flanges and oversized ports, it uses JBA's Firecone collector and includes factory-style emission connections plus quality hardware for a professional, leak-free installation.
JBA 65-86 GM Truck 265-400 Carbureted w/A.I.R. 1-5/8in Primary Silver Ctd Cat4Ward Header
