This emissions chip retains all the factory chip emissions programming as well as a couple tweaks here and there to help improve emissions. The coolant fan temperature is set higher in this chip to improve emissions, so be mindful of that if doing extended driving, and do not get into boost with it (it may be too lean). As long as your emissions equipment is in place and functioning, you should be able to pass (although I can't guarantee it will pass due to any mods you may have done to the car). If you don't have a cat, or EGR, there is nothing I can do about that. There's nothing special I do in the chip for those situations. When ordering an emissions chip, all I need to know is what year car you have, and the injector type.