Catalytic Converter question

[oldsalt]

What's the difference between a Catalytic Converter for California and one for the other 49 states? Except of course being 3 times as expensive.
Is it just that it has been approved by the Politburo at the state capitol?

 

[TigerEyz3]

California specific converters typically have more precious metal content and are "more efficient."

 

[retorq]

Pretty much "hype" and price ...