I have a feeling most carmakers have been fiddling with the emission software in order in pass smog.  I feel it&#x27;s just a matter of time and testing, and I don&#x27;t think it will just be diesels.  I looked into Ford&#x27;s GT-350 and  it&#x27;s, I believe, the fasted stock vechicle Ford has ever produced.  It passes smog with flying colors.  Engineers claim is just good engineering.  I hope that&#x27;s the case.<p>I am for reasonable smog requirements.  I know how hard I have to tune, and repair my 4 banger in order for it to pass every two years.<p>My biggest fear is the federal will tighten smog requirements to the point where most older vechicles won&#x27;t pass.  I am poor.  I drive a 4 cylinder vechicle.  My vechicles are always in tune.  I consider myself a enviormentalist.  I still hope I can afford to drive in the future?  I know I will probally never be able to buy a new vechicle.