This product is offered for off street use only. It is not legal for use on public highways. This item just isn't available or use in California. It is on the market to our Intercontinental customers to be used in just lawful restrictions inside their domicile. You might also Like https://manuelwchmr.wikicommunications.com/4329351/the_basic_principles_of_bmw_m4_g82_downpipe