FLOWTECH LONG TUBE HEADER - CERAMIC COATED 1970-1974 Firebird T/A, 1964-1974 GTO/LeMans/Grand-Am: 350-455, Tube Size 1.625", Collector Size 3" Part # 31170FLT 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 and corrosion resistant metallic ceramic thermal coating that increases exhaust velocity and reduces underhood temps for increased performance. Features: Fuel Economy From The Engine Leak Test For Max Performance Ceramic Headers Rust And Corrosion Resistance Mandrel-Formed Power Plenum Leakproof O-Ringed Port Seals About Flowtech Performance and value intersect at Flowtech. From full-length stainless steel headers for your 1969 Camaro to turbo-back exhaust systems for your late model diesel truck, Flowtech delivers the sound and power you're looking for while being easy on your wallet. SPECS Bolt Size 3/8-16 x 3/4 Brand Flowtech CARB (California) Compliant No Collector Diameter 3.00 inch Emission Code 4 Engine Pontiac V8 Header Finish Silver Ceramic Header Style Long Tube Primary Tube Dia. 1-5/8 inch Product Type Headers Tube Material Mild Steel UPC 787480311702 Part Number 31170FLT