How to avoid emissions testing?

I have a 2006 Ford Mustang Gt, completely built up with every aftermarket part you could think of, but it didn't pass emissions due to not having cats or o2 sensors running, it would cost $3000+ to get it running legally, I'm in northern Illinois. Do I have any options? Are there any ways of selling this car if it won't pass? Could I maybe sell it to my mom (I live with her) and buy me another year until I go to college which will be a place without emissions testing. Any other options are appreciated!

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