COMP Cams Hi-Tech Gear Drive System ChePrecision machined, heat treated billet Steel Gears for timing accuracy and durability. Unique design eliminates timing movement throughout the rpm range. Ready to install kit, including bolts and lock plate, ideal for street performance Applications that desire a whining blower sound . Catalog User 1 This Part Fits: Year Make Model Submodel 1977,1980 Buick Century Base 1977 1979 Buick Century Custom 1980 Buick Century Estate 1978 1980 Buick Century