You are buying one 1980 1981 1982 1983 1984 1985 Chevrolet Camaro Pontiac Astre Grand Am Safari Phoenix T 1000 Ventura Grand Prix Catalina Bonneville Firebird Oldsmobile Toronado Cutlass Supreme Firebird Omega Starfire Buick Riviera Wildcat Regal Electra LaSabre Century Datsun NOS RARE GM Secondary Air Injection Smog Pump Check Valve GM # 22050635 correct for the 2.8 3.0 3.8 4.1 4.3 5.0 5.7 engines . Please do your own research to be sure this part is correct for your car see photos no returns. May also be correct for other GM cars And Trucks. I am not sure on all the exact years or car line this check valve is correct for. The Listed shipping amount includes some of E-Bay 20 % charge,Pay Pal and handling costs. When you receive this part please contact me if you are unhappy in any way before you leave me a negative feedback so we can work out any problems....Thank You.