This 491ci V16 engine is one of fewer than 400 believed to have been produced by the Marmon Motor Car Company of Indianapolis, Indiana, during a production run from 1931 through 1933. The engine features aluminum construction—including the crankcase and cylinder heads—and retains its cast-aluminum valve covers, intake and exhaust manifolds, Stromberg DDR-3 carburetor, Delco-Remy distributor