Offenhauser 3647 Buick Oil By Pass
$48.00Offenhauser Oil By-Pass Unit for Buick V8 thru 1960.
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Offenhauser polished aluminum filtered breathers are designed to protect your engine from dust and foreign particles. They feature filters made of polyurethane foam for impressive dust retention capacity–and they’re easy to clean! These breathers are adaptable to all types of covers and applications, and are come in a variety of styles and mount options to suit your needs.
Approximately 2″ wide at top and 1 1/4 ” high. Complete with gaskets.
Accepts 3 bolt carb on 2 bolt adaption B base
Offenhauser 3920 Oldsmobile Water Crossover 303, 324, 371, 394 Aluminum
Intake Manifold, Pacesetter, Log, Aluminum, Natural, Six 2-Barrel, Chevy, Small Block Offenhauser 6-Carburetor Log intake manifolds can be used with just two or up to six 2-barrel carburetors, depending on the application. They have a balanced “Jet Air Flo” design, with rectangular “Ventura” intake passages. Designed for 3-bolt carbs only.
“Chev”- With Heat 6 Carburetor Pacesetter Manifold for 283, 327, 350
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.
Holley 4 bl Carb to Carter AFB & Small Rochester 4 bl manifold
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
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 – 90 degree