Unfortunately, I can tell you that these are CARB compliant. They are OE Nissan manifolds that came off a flex model. I know what CARB approved is, most everything that you can buy new is carb approved, even lawn mowers. I will return no money and offer no guarantee. Once shipped, its yours. There are too many variables that could make your truck fail strict emissions testing out of my control. Good luck with finding replacement parts, there are many options available online, dealership, pick n pull's etc.