[Mgs] MGB Stock Exhaust Manifold

[Osborne, Paul]

I know that there is a difference in the thickness of the flange that mates to the head . Not sure if this # denotes that thickness , but it has to be the same as it intake manifold thickness the mounting washers are flat on both the intake and exhaust manifolds.  Has nothing to do with performance.

paul



Paul Osborne
Department of Electrical and Computer Eng
University of Rochester
201 Hopeman Building RC
Rochester NY 14627
   585-275-5226








On Dec 7, 2017, at 7:07 AM, daybell7--- via Mgs <Mgs at autox.team.net<mailto:Mgs at autox.team.net>> wrote:

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



_______________________________________________

Mgs at autox.team.net<mailto:Mgs at autox.team.net>
Donate: https://urldefense.proofpoint.com/v2/url?u=http-3A__www.team.net_donate.html&d=DwICAg&c=kbmfwr1Yojg42sGEpaQh5ofMHBeTl9EI2eaqQZhHbOU&r=j_uK0-rtrtcKZ8O0aGq-Y5ZUDfHjCD_Cv57WMn_czag&m=94strXlxT4AD3OpBkj2pgm4dvo8eYYSbciNIfuuGCaY&s=gKQZo8pwc3p5HqXhiLuD06T-4eF_AdaNBbRuVT7QGK0&e=
Suggested annual donation  $12.75
Archive: https://urldefense.proofpoint.com/v2/url?u=http-3A__www.team.net_archive&d=DwICAg&c=kbmfwr1Yojg42sGEpaQh5ofMHBeTl9EI2eaqQZhHbOU&r=j_uK0-rtrtcKZ8O0aGq-Y5ZUDfHjCD_Cv57WMn_czag&m=94strXlxT4AD3OpBkj2pgm4dvo8eYYSbciNIfuuGCaY&s=QVb_piJmwY8wiYVNGlWVuFOmDD2Q5OPgAyB5rWRg6Ow&e=
Forums: https://urldefense.proofpoint.com/v2/url?u=http-3A__www.team.net_forums&d=DwICAg&c=kbmfwr1Yojg42sGEpaQh5ofMHBeTl9EI2eaqQZhHbOU&r=j_uK0-rtrtcKZ8O0aGq-Y5ZUDfHjCD_Cv57WMn_czag&m=94strXlxT4AD3OpBkj2pgm4dvo8eYYSbciNIfuuGCaY&s=EcJ4DLEMykmtiECtSC-63DVbgRzH2ZxbFtiWzyBpffc&e=
Unsubscribe: https://urldefense.proofpoint.com/v2/url?u=http-3A__autox.team.net_mailman_options_mgs_paul-40ece.rochester.edu&d=DwICAg&c=kbmfwr1Yojg42sGEpaQh5ofMHBeTl9EI2eaqQZhHbOU&r=j_uK0-rtrtcKZ8O0aGq-Y5ZUDfHjCD_Cv57WMn_czag&m=94strXlxT4AD3OpBkj2pgm4dvo8eYYSbciNIfuuGCaY&s=VRbO9KBYPDfzY36qS29xRnkKDuDKOv_ZR74oY6kR-TY&e=

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/mgs/attachments/20171207/3bca6bc8/attachment.html>