Yeah, definitely made incorrectly:
I found a website, germansupply, that has exhaust flanges available. I’m going to order two sets of flanges, and have a welding shop make 4 inch extensions, so I can use my current exhaust. Otherwise, I’d have to modify either the exhaust headers, or the collector/muffler. Extensions will let me us any stock off the shelf solution.
Now if only germansupply would ship the damn things!