Signed, but I don't think this does what SEMA is making it out to do. It's vague, but my interpretation is that the EPA wants to be able to say that "because racecar" isn't a good enough excuse to straight pipe your Miata that you're driving to work all summer. Though the bill says you can't modify the certified engines, the worst they can reasonably do is take away your ability to get such a modified car inspected, just like they can do now.

I think it's just more ammo on "street legal" cars that aren't so street legal.