Quote Originally Posted by gtikid
I've already asked this question but i'm posting it here b/c I need some quick responses.

I bought a new car and the car will pass emissions with the current motor. I'm gonna pull that motor out and I know the car will NOT pass emissions with the other motor in it. However, my birthday is withing a month, Sept. 22. If I do the emissions now, such as today, can I use that emission to register my car? Or if I get my emissions done now, will I have to register my car, then do emissions again to renew it?

I got some answers in my other thread but we're still not clear on it. Thanks for any help
So then, you're planning to pull the motor out every year to pass your emissions?

Back when I had my WRX, I could still pass emissions with out any cats because of my engine management (ECUtek). As long as you don't throw any codes (check engine lights) for 0 catalyst efficientcy, you should be fine. As long as you have an OBD II vehicle, they won't hook the sniffer up to your exhaust.