OK. I know that this subject has been tossed around everywhere but I want to get all my facts straight in one thread instead of bits and pieces. I currently have a Zetec engine with a 2.25" "y" pipe, cat-back exhaust that was already on the car when I bought it. I am not going FI and currently just have a ractive intake. I wanted to know the best combo to go with headers and/or high-flow cat. Also, I live in Ohio and we have that stupid e-check so it still needs to pass. If I go with the racing long piped headers will I not pass the e-check? I've heard a lot about the SVT headers but what do I need for that (will it pass an e-check?). Any help will be great since I'm still new to the aftermarket game.