I had this whole issue back in April as well, a smog shop did tell me as well they can do that. What they are referring too is that you remove your tune and keep your CATs do the driving period to reset your EVAP in hopes for them to pass your smog. But this is not possible because if you don't have primary cats and go back to Stock tune there is a very high chance your check engine light will turn on. Which then takes you back to Square 1. My suggestion is put OEM pipes,OEM tune. Reset your EVAP (there is a driving sequence to follow you can find online) and just get your car smog passed normally.
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