This Offenhauser adapter plate mounts a Quad Adaption C carburetor on a Quad Adaption A or B manifold base, turned 90 degrees. It suits Offenhauser flathead and Ford Y-block 4-barrel manifolds among other applications.

Offenhauser 4006-5170-90 Carburetor Adapter Features:

• Adapts a Quad Adaption C carburetor to a Quad Adaption A or B manifold base
• Rotates the carburetor 90 degrees
• Works on Offenhauser flathead 4-barrel intakes, Ford Y-block and other applications
• Manifold base measures 3-7/8 in. x 3-3/4 in.
• Approximately 1/2 in. thick
• Carter AFB or Edelbrock carbs will not clear the water outlets on 1948 and earlier flatheads