Manufacturers are perfectly free to run separate lines at their plants to make more polluting cars for other states to take advantage of this theoretical market

Manufacturers are perfectly free to run separate lines at their plants to make more polluting cars for other states to take advantage of this theoretical market of consumers clamoring for pollution. Also, a number of states require adherence to the California standards. It should also be noted that California is the fifth or sixth largest economy in the world that's dramatically disenfranchised with respect to its representation in US government.