I have a 1974 (1975 model, CA version) W114 with M110 engine. Factory exhaust is single pipe with catalytic converter. I am installing a pair of exhaust manifolds from euro W123. They are 3 into 1 manifolds, two of them. The Euro M110 had dual downpipes. I looked through some catalogs and I see that earlier W114 also had this manifold setup (3 into 1 and 2 downpipes). Does anybody know whether the manifold flanges on W114 and W123 are the same or not? My W123 flanges are 2 bolts per flange. I was thinking about using either W114 dual downpipes or W123 dual downpipes, to minimize amount of mandrel bending and fabrication (hence lower cost). I am not sure whether the exhaust pipes and flanges are the same on W123 and W114. I thought that W114 were 3 bolt flanges, but I may be confusing them with something else.

The manifold numbers are 110.142.6502 and 110.142.6602 manufactured 19.04.80

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