I have a manifold similliar to the one shown by Tulka. Markings on the bottom are "BA82357 / EG49".  I currently have a pair of HS4s on it but it could also take HS6s. It uses locating rings, and has emission and servo takeoffs. It's 6" on center.

meb   

Tulka, Interesting variation of the 12A-309.  Must be from a 998 since all 997's used the studs for location.  All of mine are from 997's, more common in the US than the 998 Cooper.  I'll revise the list to show that one as either stud or ring mount.

Are there any other markings on the AEG 489?  The markings in your picture appear to be on the bottom of the manifold.  The markings I show on the chart are from an AEG 489 that's mounted on one of my race cars, will take it off this weekend to see if there's anything on the bottom of it.  The engine needs to come out anyway .....

Finally, do you have a reference source for the AEG 572 part number for the Evolution manifold?  Not challenging your input, I've just never seen that number listed anywhere and would like to document it if possible.  As noted on my chart the RAC homologation papers (copy attached) don't list a part number, but the pictured manifold has the rectangular mounting face of the C-AEG 488.

Great input, keep it coming.  I'll see about MM including all this in the Tech Section.

I expect Nick (Min-E-Bitz) will chime in. He's done an extensive list of the Cooper/S manifolds.

When the list gets done (or at least far enough along!), contact Mini Mania and have them add it to the Tech section under Articles & News.

Same as Randys 12A309 manifold,but with ring location.Also AEG489 casting numbers on original competitions manifold.

 The "Evolution" can be AEG572/MK2 Cooper/S

 Tulka

My 12A661P2 1004, you can't really see the 1004, but its there. Crappy camera. I got this from a gentleman in England, it wasn't a Stateside purchase, if that means anything.

Cheers,

Ian

I will have a dig through some of my boxes of tut at the weekend to see what I can find.  I'll send pics in on Monday.  Are we sticking to BMC manifolds or is anyone interested in Non BMC too.  Downton, Speedwell, Mangoletsi etc?

Mark F.

Check Out //mk1-performance-conversions.co.uk loads of info and interesting stuff for the mk1 nut.

All, I have AEG 347 and C-AEG 489 (at the very least) and will be posting pictures of those, so don't worry about searching for examples.  Also have three or four versions of the MG 1100.

Club Man's excellent pics support that that's a 998-only manifold.  It's the center boss that's drilled and tapped for vacuum, the location of the PCV valve.  Were it for an S brake booster it would be the right boss drilled and tapped.

The pictures do raise a question.  I've received descriptions (but no pictures) of this manifold having P2 cast in it, but the pictures show only the P.  Anyone have a P2 casting?

RM

12A661 P 1004

Make it idiot proof, and someone will make a better idiot....

Given recent discussions on this board and the Vintage Mini Racing board concerning Cooper intake manifolds, I've tried to make up a chart of the pertinent info.  As much as possible this is based on official publications (BMC parts manuals, Special Tuning Sheets, Homologation Papers) and having an actual example of the manifold to inspect.  There are gaps and possible errors, so factual input is appreciated, either via this thread or direct e-mail.  Updated versions of the chart will be posted and will hopefully be of use for reference.  No chest thumping and tall tales please, just verifiable facts.  If you have pictures, preferrably of stripped manifolds, those would be appreciated.  I've attached pictures of the great grandfather of them all, 12A 308, and have a few more to strip and photo over the weekend.  I'm also accumulating information on some of the posers and red herrings, e.g., MG 1100, Sprite, etc.  Bottom line on the Cooper manifolds is that they were pretty much all the same dimensionally with variations in the attachments.