I have an 05 spec v and have been wanting to get my car tuned. Only thing stopping me is I live in California so I dont want to have to get my car tuned every smog period. So, I did some diging and I read that 04 and 06 ecu only can have multiple map setting, I just had to get an 05 lol. I read the 06 is a wiring mess to get working, plus California. So my question is, how do I tell the difference between an 04 ecu and 05, mines non-nats, and would it be a plug and play or is there things to be aware of?