Fits: 1973–1975 Buick Apollo 1973–1977 Buick Century 1967–1980 Buick Electra 1970–1976, 1978–1980 Buick Estate Wagon 1968–1980 Buick LeSabre 1973–1977 Buick Regal 1967–1978 Buick Riviera 1967–1972, 1975–1976 Buick Skylark 1971–1973 Buick Centurion 1967 Buick Gran Sport 1970–1972 Buick GS 1968–1969 Buick GS 350 1968–1969 Buick GS 400 1970–1972 Buick GS 455 1967–1970 Buick Wildcat 1968–1969 Buick Special 1968–1972 Buick Sportwagon 1973–1977 Chevrolet Corvette 1972 Chevrolet Chevelle 1973 Chevrolet Impala 1973 Chevrolet Malibu 1972–1973 Chevrolet Monte Carlo 1974 Chevrolet Nova 1975–1976 Oldsmobile Omega 1978–1980 Pontiac Bonneville 1972, 1978–1980 Pontiac Catalina COMP Cams910-16Valve Springs, RetainersSingle Outer Valve Springs from COMP Cams allow you to build the perfect spring assembly for your application. The valve spring creation process is far more involved than most people realize. Selecting the right metal stock and creating the best design is not done by chance. COMP Cams has developed a process that creates the highest quality valve spring available. The result is a product that meets and exceeds the expectations of today's engine builders and racers.Valve springs are one of the most critical and overlooked components in your engine. They must be matched to your cam in order for the engine to reach its full potential. It does absolutely no good to install a cam that will perform up to 8,000 rpm if you do not have the correct springs. Use the only valve springs that will give the recommended spring pressure with the valve both on the seat and at maximum lift. COMP Cams valve springs are offered in single and dual styles to meet your cam requirements.