bah just gut em. FIX the CEL and you're set or if you are set on having cats...a friend I know that has an exhaust shop does this. When someone comes in with a car that has expensive cats that have gone bad...ie contour or older tauri (taurus's) he guts the factory cat and welds an extra cat behind that spot. I personally would rather just gut them or it's a great time to buy headers...for just the header's it's only 200.
