In addition to Kelvin the parts catalogue shows *four* for the twin SU
cars - 18GA, 18GA to GD, 18GG to GK, and 18V. The easily discernable
differences between them are in the number of ports on the balance tube -
the first having two small ones in the central portion, then two small and
one larger, then three small with the previous larger one blanked off but a
new larger one right at the rear end at an angle (brake servo), then a
combination of these last two i.e. 3 small and the central larger one opened
out again plus the angled one. It also shows two twin SU exhaust
manifolds - one for 18Gx engines and one for 18V, so this may be when the
thickness of the flanges changed.
PaulH.
----- Original Message -----
> could I get an opinion of weather all the Exhaust Manifolds for the "B"
> were
> the same or were there different types for different years of the "B" ?
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