Evo 8 Tuned??
Hi guys, just picked up my 04 evo. Here's what it came with: evo 9 bov and exhaust. Now it looks to me as if the dealer welded on the stock cat to pass smog because it had tbe. So I just bought another downpipe and high flow cat so i can do the stage 2. But now im starting to think it may already be tuned for stage 2 because i ran my car with open downpipe and i dont know, i may be wrong, but i heard that the check engine light should turn on when running your car with no sensor or cat being untuned? Is this correct? Or whats the easiest way you can figure out if its tuned or not?