Hi, my exhaust is 48.3mm od, my v-clamp flanch is 50.8mm id

How do i fill that gap? Do i jus MAG fill it? Do i use shims?

An adapter ring is not for sale, and making one seems a bit out of the project time and money.

I could do a flat piece and roll it? But that seems dodgy and to diy-ish

I need it to hold, not really be pretty, thats why iam going to MAG weld it. As that is what i have on hand.