[Mgs] MGB Stock Exhaust Manifold

[daybell7 at aol.com]

I found some HS4s in the dungeon and am replacing the weber and header on my 1968 GT, but still need the stock exhaust manifold.   I see the manifolds stamped with two numbers: 12H709 and 12H3911.  


Is there a difference between the manifolds?  One for HS4s and one for the HIF carburetor?  My 72 MGB has HIFs and the 12H709 manifold.  I don’t think it matters.


Thanks, Steve Hughes
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