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Is the only difference in the 1B an 2B the air filter? I am not sure which unit I have. I got the unit from a guy who had no idea what he had. The instructions say VR-1B. I don't what to use the filer if it is a 1B. Does anybody know what to K&N part number is?
K&N part number link above. There seems to be several different types of filters from Vararam and yes the 1B vs. 2B filters are different. Check out the Vararam web site.