My Camry did not pass smog..They adjusted it to pass smog...It passed, it ran like shit...I re-adjusted it. End of story until next test.
Are you talking about downloading different software calibrations? There’s not anything to “adjust” otherwise these days.
My car was a 1.8L fuel injected flat 4. The suspension was stiffened for slalom competition. It would turn on a dime. I purchased it from a slalom competition. He took the 2.0L engine normally aspirated engine from my car and put it into a much stiffer "shell" for competition. The 1.8L was a sort of downgrade. By the time I sold it, I had replaced the exhaust, clutch, fuel injection computer, fuel pump, all 4 rotors/calipers, added a 911 brake cylinder and stainless steel brake lines. I miss driving the car, but it isn't practical for life in Idaho.