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I'm trying to install a magnaflow cat back system on my 2013 F250 Lariat 6.2. I have everything removed but I'm having trouble with the bolts/studs in the cat flange. Are these just bolts or are they studs?? I've cut them off in the middle between the 2 flanges and now I'm trying to back them out but it seems they are not budging. I'm starting to think they are studs. Any help would be appreciated. I live in Canada so that's why I had to cut them out, rusted AF. Here's a pic of them cut off. It looks like a nut there on the cat side.
