COMP Cams Camshaft P8 279T H-107 T ThumperThumpr 227 241 Hydraulic Flat Cam for Pontiac 265 455 Thumpr High performance street, stock converter ok, best with 2000+ converter and Gears. Choppy thumping idle. Catalog User 1 This Part Fits: Year Make Model Submodel 1972 Buick Centurion Base 1980 1981 Buick Century Base 1979 Buick Century Custom 1980 1981 Buick Century Estate 1979 1981 Buick Century Limited 1979 Buick Century Special 1979 1981 Buick Century Sport 1974 Buick Electra 225 1974 Buick