My big question is do they actually look for these sort of items? We smog in Denver, but thankfully aren't at CAFE standards yet. I have a supercharger and DT headers. I have no problem getting my exhaust numbers well below the limits. Honestly, if these engines are putting out bad exhaust numbers, it is prudent to fix them. The LC isn't my 335i that I swap the downpipes on to smog so that it will pass. That does make a big difference to allow to be a bit at the limit of the numbers.
Also,
@TRAIL TAILOR , any idea if the new rear shock guards would be compatible with an Icon shock? I cannot think off the top of my head why they wouldn't.