E30 Zone

Morning All,

First time posting, I'm looking to weld up a log manifold for an M40 (I know its the inferior engine but hey ho).

Does anyone have a diameter for the exhaust ports?

Saves me the hassle of dropping the exhaust before I order the pipe.

Cheers,

Dan

Welcome to the zone Dan, sure enough someone will come along to help you mate.

Mart.

Not a direct answer but you could get a exhaust manifold gasket and use the measurements from that.
Also a good guide if you plan on opening up the ports a tad.
HTH