Overview:Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 5/16" flanges with sealing rings for a leak-free seal. All mounting hardware and gaskets are included for a simple installation. This header is coated in a high heat resistant black paint for a stealthy appearance.Features: Fuel Economy From The Engine Leak Test For Max Performance Mandrel-Formed Power Plenum Leakproof O-Ringed Port Seals Include All Mounting Hardware Constructed of .049 cold roll flash mild steel tubing Precision engineered for fit, performance and economy Application: 1968-1974 Dodge W100 Pickup 1969-1974 Dodge W200 Pickup 1974-1978 Plymouth Trailduster 1975-1978 Dodge W200 1975-1977 Dodge W100 1977-1978 Dodge W150 Specs: Brand Flowtech Collector Diameter 3.00 inch Emission Code 4 Engine Chrysler Big Block B/RB Header Finish Black Paint Header Style Long Tube Primary Tube Dia. 1-3/4 inch Product Type Headers Tube Material Mild Steel Warning California Proposition 65