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This Offenhauser carb adapter will work on their flathead 4 brl intake manifold (also Y-block Ford and other apps) to put on either a Carter AFB, Edelbrock Performer or Holley std bore 4 brl. ( AFB or Edelbrock won’t work on 48 and earlier engines because of the water outlets).  The manifold base measurement is 3 & 7/8″ X 3 & 3/4″.  It is prox 1/2″ thick.
Quad Adapter C Carb. On either Quad Adaptation A or B Base
Quad Adapter C Carb. On either Quad Adaptation A or B Base – 90 degree
Offenhauser 4035 Adapter. 3 bolt carb to 4 bolt base, most drill 1 hole in manifold base.
49-64 FORD or 51-64 MERC Trans. Bolt Flange to Cad- LaSalle Trans.
Offenhauser 5045 Wedge Carburetor Adapter 8 degree leveling block for oval track racing. Accepts quad adaption C carb on quad adaption A base.
Offenhauser 5045-A Wedge Carburetor Adapter 8 degree leveling block for oval track racing. Accepts quad adaption A or C on same size manifold base.
Offenhauser 5045-B Wedge Carburetor Adapter 8 degree leveling block for oval track racing. Accepts quad adaption C carb to same size manifold base.
Offenhauser 5095-A Quad Adapt. level Block 4 Bolt Adaption A Carb on B or C Base
Offenhauser 5173 Engine Adapter Flange Chevy to Ford 49-64 or Mercury 51-64 Comes with mounting hardware.
Offenhauser 5174 Engine Adapter Flange Chevy to Ford 32-48 or Mercury 39-50 Fully cast aluminum.
Offenhauser 5248 Bolt on Block Off Plate. Carb cover pad for large base 2 throat 4 b carbs. For large base only. 3 3/4″ bolt pattern. .
Offenhauser 5272 Manual Trans to Flathead V8 Adapter. Permits use of early Ford clutch release shaft, fork and throw out bearing, when connecting Chevrolet transmission to early Ford and Mercury adapter flange. Throwout bearing must be used with a Long-style pressure plate. Includes pilot bushing adapter. Please note that other linkage is not included and must be purchased separately.
Offenhauser 5282A – Accepts either quad adaption B or C on quad adaption A base. Also has tapered ports. Gasket not included. See part #5495.
The Offenhauser 5283 Quad Adaption Accepts Quad Adaption B or C on 4 Bolt B Base
