My catalytic converter is still good but the flange needs to be welded on to attach to manifold.how much would that be

Hello, my best suggestion is to see an equipped exhaust and muffler shop near you that can weld this. You'll have to contact them for the quote. It's an "actual time" repair, so the price will vary. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops