INTAKE MANIFOLD GASKET, 12A 81-85 and 74-75

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  MANIFOLD HOLLEY, 74-85 12A BRIDGEPORT

  Holley Manifold, 74-85 12A Bridgeport (74-85)

  The Racing Beat-designed intake manifold (1-9/16″ throttle bore diameter), for the 1971-85 12A Bridge-ported engine is ideally suited to meet the performance requirements of the Holley carburetor. Designed by Chief Engineer/Engine Builder Jim Mederer, these cast aluminum intake manifolds have proven themselves in a variety of street and race applications.

  All of Racing Beat’s manifolds for Holley carburetor applications are sand-cast by a local foundries and delivered to our in-house production shop for all machining and surface finishing processes. Select manifolds are then hand-ported to match a specific intake port configuration for an intended engine application. Further machining is then undertaken to match the base-plate surface to the Holley carburetor base. These critical machining steps ensure a positive fitment between both the engine surface and the carburetor base. Every manifold is then surface finished using a ball-burnishing process that enhances the final appearance of the aluminum material. Once these labor-intensive processes have been completed these manifolds look as good as they perform!

  This manifold includes does not include a vacuum source for power brakes. If needed, an engine-to-manifold gasket, and/or Holley base gasket are available separately.

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  WATER JACKET O-RING for Intake Manifold

  

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  We tested / looked at aftermarket O-rings but never found any that worked as well as these Mazda OEM ones.
  We recommend using new ones anytime you are installing your intake manifold.
  

  Needed on 1970 – 1992 non-6-port engines. This includes all the 86-92 Turbo rotor housings in case you are using those in another engine combo.

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  HEATSHIELD, 74-95 ALL 12A & 13B

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  GASKET SET, RX7 81-82 12A —NLA—

  

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  Sorry, this item has been discontinued by Mazda.

   

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  GASKET SET 74-85, O-RINGS ONLY

  

  Gasket Set 74-85, O-Rings Only

  This kit contains:

  Red Water Jacket Seals
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  Front Cover O-Ring
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