All very interesting, my F reg (1 Jan 89) 325i Sport donor was always described as "cat prepared" or "cat ready" when I went looking for exhausts. It does not have a cat or lambda sensor, but I think it would have done if sold in other EU countries as we were late adopting the cat principle.
This leads me to wonder if it is the lower compression engine.
So I thought I would check to see the engine number and codes but I have totally failed to find them on the block which is still awaiting refurb in the garage. I thought they should be on a machined area low down on the inlet side but can find no trace of any digits - I hope they have not corroded away! Can someone tell me exactly where these markings should be on a UK engine? Help!
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