This 1.6-liter Type 616/2 flat-four engine, originally produced in 1959 for a Porsche 356A, retains its two Zenith downdraft carburetors, exhaust components, and generator. The engine features a three-piece crankcase and a lightened flywheel, and is offered with a spare Zenith carburetor. Stamping P*83734* confirms it as a 1600S flat-four from 1959 for a 356A T2.