I'm a smog tech. It may or may not pass the tailpipe depending on how it's tuned, will NOT pass visual because the Weber itself is not CARB (Cal Air Resources Board) approved on these engines and the installation disables the EGR, pulse air pump and thermostatic air cleaner. It's a ridiculous rule. If you can get it to pass the tailpipe and you explain to the tech what's going on before you test, he might be able to look the other way. If it was up to me...