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The JBA Cat4Ward header for 1965–1986 GM trucks (265–400 SBC, carbureted, with A.I.R.) is a shorty-style upgrade that opens exhaust flow and improves engine efficiency compared with stock manifolds. It features mandrel-bent stainless tubing, 3/8" thick machined flanges, oversized exhaust ports and the Firecone collector, and ships with factory-style emission connections and heavy-duty installation hardware.
JBA 65-86 GM Truck 265-400 Carbureted w/A.I.R. 1-5/8in Primary Raw 409SS Cat4Ward Header
