Greetings! I have just moved from Florida to Colorado with my TurboBuick! Now I need to pass the Colorado Emissions! Right now I need to put a CAT back on. When I bought this car in Florida there wasn't one installed. I have a 3 inch ATR downpipe in it so I will need a 3 inch to 4 bolt flange CAT. Anyone have a good source???? NOW.... What things do I have to look at and adjust to get my car to pass the emissions? I have Turbo Link so I can look at all my setting to see where they are. Any suggestion are appeciated!