Hello! This is my first post, i think, and i need some real advice! I ran my 2004 SE 3.0L Vulcan with a misfire for too long and fried the cats. This car was, according to the mechanic, a California Emission vehicle, so he is telling me i need to buy these cats from the dealer that are upwards of $1200 EACH. I should tell you i dont live in CA, i live in CO, and our emission standards are much lower, but the mechanic is telling me if i put on parts store cats it will throw the whole system out within 6mo. I have the cats disconnected at the moment, trying to leave the car in the driveway. IF ANYONE has any experience with "CA emission" tauruses and changing out the cats, please let me know! thank you for any advice!