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The JBA Cat4Ward header for 1999–2001 GM trucks with 4.8L or 5.3L LS engines without A.I.R. and with EGR uses 1-5/8" primaries to improve midrange torque and flow. Constructed from durable 409 stainless with mandrel-bent tubing, it features JBA's Firecone collector, 3/8" machined flanges and oversized ports, extra-thick collector domes and factory-style emission connections with included hardware for a professional installation.
JBA 99-01 GM Truck 4.8L/5.3L LS w/o A.I.R. w/EGR 1-5/8in Primary Raw 409SS Cat4Ward Header
