Overview:FLOWTECH's Afterburner Turbo Chamber Headers represent the first new major design change in exhaust technology in decades. This designs combines the race-proven 4 into 1 design with the torque managing capabilities of a Tri-Y header. The turbo chamber helps smooth out exhaust turbulence for increased performance and a broad power curve. This header is coated in a high temperature electrostatic gray finish.Features: Painted versions feature a premium high-temperature black finish Horsepower and Torque increased over conventional header design Big 3” secondary collector for reduced back pressure Tuned-length primary tubes combine with Velocity Tube to smooth out exhaust pulses Patented Velocity Tube increases cylinder scavenging All hardware and premium gaskets included for a complete installation Application: 1970-1988 Chevrolet Monte Carlo 1967-1981 Chevrolet Camaro 1973-1983 Chevrolet Malibu 1969-1979 Chevrolet Nova 1980-1987 Pontiac Grand Prix 1968-1973 Chevrolet Chevelle 1978-1980 Oldsmobile Cutlass 1978-1980 Oldsmobile Cutlass Salon 1978-1980 Oldsmobile Cutlass Calais 1978-1980 Oldsmobile Cutlass Supreme 1978-1980 Buick Regal 1968 Chevrolet Chevy II 1980 Oldsmobile Cutlass Cruiser Specs: Brand Flowtech Collector Diameter 3.00 inch Emission Code 4 Engine Chevrolet Small Block Header Finish Black Paint Header Style Long Tube Primary Tube Dia. 1-5/8 inch Product Type Headers Tube Material Mild Steel Warning California Proposition 65