This intake is currently covered by CARB EO #: D-161-103. Executive Orders are written documentation of compliance with CARB regulations, certified to specific emissions standards. This intake does not require a tune. Although MPT offers for sale products with California Air Resources Board (CARB) Executive Order (EO) certifications, MPT maintains a site-wide policy of no sales to California. https://www.morepowertuning.com/emissions