So I'm going to make a "cold air" intake for my 2017 clubman cooper s. I took off the intake to check the maf diameter and came up with a 69-72mm id (weird that it's not the same size inlet and outlet of the maf tube) and 80mm od. Is there an off the shelf pipe that is this size that I can stuff the factory maf in ? If not I have a tig and can weld, do they make a just the maf adaptor? I'd rather not have to fabricate the whole thing.

Thanks!