California has always required any emission component replacement to carry with it documentation indicating the unit is California legal. Even back in 1998 you would have had to provide the smog station conducting your vehicle's smog check with documents proving the CAT was legal for California use; unless the EO number was stamped on the unit. So not much has changed now; go ahead and have your Trooper inspected. If all is well, emissions are low, components are functioning, you should pass the test.
posted by SmogTips Support