90 Degree Adapter Fitting 5/8" Heater Hose to 1/2" NPT 4530 Aluminum Alloy for Intake Manifold This Fitting Has A 90 Degree Fitting With 5/8" Nipple and 1/2" Pipe Thread For Intake Manifold. Aluminum Alloy For Great Shine and Durability. Fits the following applications: All Chevy Cars With The Small Block Chevy Engines: 283 305 307 327 350 383 400 1967-1981 Camaro 1960-1979 Impala, Caprice, Belair, (ALL full size Chevy cars) 1962-1979 Nova 1965-1972 Chevelle 1970-1985 Monte Carlo 1964-1985 Malibu .