wow, this was posted 3.5 years ago. any answer? i have the powerchip (ECU flash) and am wondering if it will pass the smog test? does anyone have any experience with this? according to powerchip, it is not legal in CA (yet). powerchip will reflash the ECU to get it back to factory (for a price) and then re-re-flash back (for a price), but i hope it doesn't come to that.