I have gotten them for three cars...one to retire the 6.9 the 79 240D and the 74 240D when it had a ruptured vaccum diaphragm.... they can all suck it... especially the two LA ones....
It's because there are so many people in CA. I work for DOT and the emission department here is only 3 people for the whole southeastern part of WI.I'm with Aaron! I'm glad its not a concern here!