Thanks for the quick reply. I am not familiar with the terminology "SLS". I presume this relates to the grey-market emissions system. If you have a part number to share from the "box" that regulates air/fuel ratio that would be great.

If anyone else knows where I could find this part, that would be awesome. As a point of reference I am preparing to go before a California emissions referee having just secured an lab-test exemption. Would be happy to advise others on this process.