i have a fj60 that refuses to pass emmisions but im close so im thinkin a cat will do the trick. i built a new exhaust out of 2" tubing. Header+tubing+flowmaster+tubing. I want to add a cat between the header and the flow. i need to find a used cat. I was thinking domestic junkyard find... cheap and enough to bring numbers down. any idea on what i could use.