Many have asked what the different bore sizes are of the two different GM
4bbl intakes I have.
Manifold #1
two are: 1-5/16"
two are: 1-1/2"
Manifold #2
two are: 1-7/16"
two are: 1-5/8"
Larry Hoy
> -----Original Message-----
> From: owner-mgb-v8@autox.team.net
> [mailto:owner-mgb-v8@autox.team.net] On Behalf Of Carl Floyd
> Sent: Wednesday, July 07, 2004 7:42 AM
> To: mgb-v8@autox.team.net
> Subject: Re: GM 4 bbl intakes
>
> Larry,
>
> I don't think it will make any difference since the opening
> below is larger anyway. Maybe it was designed for a larger carb.
>
> Are the intake ports the same size? That would definitely
> make a difference and would be a very interesting discovery!
>
> Carl Floyd
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