I've heard that CC's reduce noxious gases but actually increase greenhouse gases...what we need is some
real ethanol like Brazil has instead of the corn scam
![Frown](https://www.fuelly.com/forums/images/smilies/frown.gif)
...or to drive less, which would be ideal.
As far as noise, its pretty tame under 3k RPMs and the sound is beautiful because of the boxer engine; I wouldn't want to make it quieter. I've had a number of cops follow me with the exhaust and the one who pulled me over did it for another reason without even mentioning the exhaust. I'm still surprised; the thing is huge, I can stick my arm in it down to the elbow