[Mgs] MGB exhaust manifold

Barney Gaylord barneymg at mgaguru.com
Mon Nov 15 20:25:48 MST 2021

The casting number is commonly one digit 
different from the final part number.  I think 
they made the finished part drawing first, then 
made a copy of it to modify the drawing to show 
more material on the casting before 
machining.  When assigning drawing numbers, the 
finished part number was first followed by the 
casting number.  Some castings can be machined 
differently to make different finished parts (with different part numbers).

Barney Gaylord
1958 MGA with an attitude

At 06:10 PM 11/15/2021, S.Carr wrote:

>The Moss catalog lists two different part 
>numbers for the stock cast-iron 
>manifold—depending on the years fitted—but the 
>drawings look idendentical.  Can anyone supply 
>the casting numbers for each?  We don’t know what we have.
>Thanks in advance,
>Sarah Carr
>BN1 in PA
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