E30 Zone

Has anyone got a diagram on where and how much material to remove from a m20 fly so it fits a m50
Or do ppl just put the fly up mark what needs to come off and have it done

You only need to remove about 4mm, but taking it right back to the ring gear gets rid of a lot of weight

I see , so min 4mm but up to ring gear better, and im guessing thats across the rear face which is only about 20mm anyway

I got mine reduced to around 5.9kg