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The JBA Cat4Ward header for 1988–1993 GM trucks with 7.4L BBC engines and A.I.R. (silver-coated primaries) replaces restrictive manifolds to open exhaust flow and improve efficiency. It features mandrel-bent stainless tubing, 3/8" machined flanges, oversized ports and the Firecone collector, plus factory-style emission connections and high-quality hardware for a professional, leak-free fitment.
JBA 88-93 GM Truck 7.4L BBC w/A.I.R. 1-3/4in Primary Silver Ctd Cat4Ward Header
