1959/1966 Buick 401/425 Nailhead Quadrajet Intake Manifold

This manifold uses the Quadrajet carburetor option (instead of the standard Carter AFB) on the Buick 401 Nailhead engines. In 401 GranSports in1966 it took the HP from 325 to 340. It supposedly ran better than the dual quad setup and was less temperamental. This was also the manifold used on the big cars with the 425 engine in 1966 and could most likely be ordered on the 401 engine big cars. The date code is clearly visible on the manifold and the red paint looks correct and some of it may be original, but can't verify that. Fits all 1959/66 401/425 engines.

This manifold is in great condition with the original vacuum fittings and brass plug still in it. There is no physical damage or rust and all mounting ears are in perfect shape. Carburetor mounting threads are also perfect. If you are looking for a nice factory upgrade to your engine this is it.

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Cash and local pickup only.