2004-08 Ford F-150 4.6L headers. All tubes are CNC mandrel bent for optimal flow. Made from 304 stainless steel for maximum corrosion resistance. Starting with a CNC cut 3/8" thick flanges into 1-5/8" primaries with hi-flow catalytic converters, 2-1/2" lead pipes and clamps. Designed to mate to factory connection point. Headers are fully TIG welded and back purged. These are TIG welded for strength and durability. These kits come with a lifetime warranty and proudly made in the USA.. 2004-08 Ford F-150 4.6L headers made from 304 stainless steel featuring 1-5/8" primaries with hi-flow catalytic converters, 2-1/2" lead pipes and clamps. Designed to mate to factory connection point.. Stainless Works 04-08 Ford F-150 4.6L 4WD 1-5/8in Long Tube Headers w/ Catted Leads (Factory Conn.). Stainless Works Headers 1-5/8" With Catted Leads (4WD Only) Factory Connect. Stainless Works, Ford F150 Headers, F150 headers, F150 4.6L headers. Stainless Works Ford F150 Truck Headers Catted.. 2004 thru 2008 Ford F150 1/2 Ton 4.6L. Stainless Works 2004-08 F150 Catted. Exhaust Header Pipe Kit. Exhaust System. Header Kit

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