Steve, In Calif. 1975 and older vehicles are "exept from bi-annual smog inspection". This does not mean that they do not need to comply. IE remain stock. What we are trying to do is get them exempted period. Look at what CARB (california air recources board) is trying to do the the diesel trucks. All it takes is for CARB to change their minds and our cars are back into the smog program. We are much more vulnerable than most of us know.