66 HiPo Exhaust Manifold thread size?

  • Hey all,


    Wonder if anyone know the thread size of the 66 stock HiPo exhaust manifolds, I need to chase some threads on them and wondering what size they are suppose to be for the stock threaded studs.


    Thanks,


    Jason

    February 10th 1966 - San Jose - Factory GT K-Code Automatic, Candy Apple Red Fastback, Black Standard Interior

  • Post by Morsel ().

    This post was deleted by the author themselves: incorrect information ().
  • Jason, 7/16 x 14.


    -Fred-

    65 Koupe early San Jose Phoenician Yellow 4 speed
    66 GT Koupe Dearborn Blue 4 speed
    66 KGT San Jose fastback pony interior Silver Frost 4 speed
    64 Falcon sedan delivery 289 4 speed
    65 Ranchero 289 4 speed
    66 Corvette roadster 427/425 4 speed

  • Jason, 7/16 x 14.


    -Fred-

    So both sides are the same, is it just that the threads on the stud are blunted that go into the manifold that they seem different and super tight... I thought both sides weren't the same, but I just checked it and your right, 7/16 x 14 is a smooth fit in the manifolds,...


    Thanks as always Fred


    Jason

    February 10th 1966 - San Jose - Factory GT K-Code Automatic, Candy Apple Red Fastback, Black Standard Interior

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