Quote:
|
Originally Posted by inTgr8r
Quote:
Originally Posted by RobMCoupe
I agreed. My car passed smog with flying color back in December 2013.
|
which begs the question....
why the heck did BMW install CATs in the manifold of N.American cars anyway  |
Cold start emissions reduction. Probably a California Air Resources board requirement. Putting the cats closer to the cylinder heats them faster. Or so that's how the story usually goes.