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 3/8" 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: Tuned-length primary tubes for street performance Mandrel-bent tubing for smooth exhaust flow Light weight & sturdy 16 gauge tubing Mandrel-formed Power Plenum collector for low back pressure Sturdy, leak-tested O-Ring port seals Engineered for a precision fit Designed for easy, trouble-free installation Includes all mounting hardware and premium gaskets Mid-Length style header, will also work with catalytic converter equipped vehicles. Head pipe fabrication required Application: 1971-1991 Chevrolet Caprice 1970-1987 Chevrolet Monte Carlo 1967-1981 Chevrolet Camaro 1971-1985 Chevrolet Impala 1969-1979 Chevrolet Nova 1973-1983 Chevrolet Malibu 1968-1973 Chevrolet Chevelle 1971-1975 Chevrolet Bel Air 1976-1979 Chevrolet Monza 1973-1976 Chevrolet Laguna 1978-1980 Oldsmobile Cutlass Calais 1980-1982 Oldsmobile Cutlass Cruiser 1978-1980 Oldsmobile Cutlass 1978-1980 Oldsmobile Cutlass Supreme 1978-1980 Oldsmobile Cutlass Salon 1971-1972 Chevrolet Townsman 1971-1972 Chevrolet Kingswood 1971-1972 Chevrolet Biscayne 1971-1972 Chevrolet Brookwood 1968 Chevrolet Chevy II Specs: Brand Flowtech Collector Diameter 2.50 inch Emission Code 4 Engine Chevrolet Small Block Header Finish Black Paint Header Flange Thickness (in) 3/8 inch Header Style Mid Length Primary Tube Dia. 1-1/2 inch Product Type Headers Tube Material Mild Steel Warning California Proposition 65