Quick cat question

just picked up a 2002 allroad tt. has a check engine light because of catless dp's were installed by previous owner tryn to save a buck.



so have any of you put aftermarket cats in the dps? and would a set of spun magnaflows be ok? i can tig weld some new cats in too these stainless pipes at work if it will work. i just want the light off. cars bone stock and will be a daily . so i dont care about hp boost or upgrades just this damn annoying yellow light lol. help me kill it. please