BILLET SATIN ALUMINUM RADIATOR CAP KNURLED. KNURLED ON EDGES FOR AN EASY GRIP. RADIATOR CAP. THIS CAP IS 16 LB. FITS MOST HOT RODS AND CLASSICS ENGINES INCLUDING GM (CHEVY, GMC, OLDS, Cadillac, PONTIAC, Buick, Ford, & Mopar (Chrysler, Dodge, PLYMOUTH). ).