Many of should take note if we live in states that are or have adopted CARB
emissions requirements. All of our Vanagons with water boxer engines are "50
state" vehicles. The air cooled ones where either a "49 state" or California
version. I am a bit confused if we have some leeway being older than 1993
but it appears that in New York we will be required to use OEM or CARB
approved converters for replacements. Also note the restrictions for used
converters are for "any" model year vehicle.

http://longislandcatalytic.com/carb-news/

Dennis