Aftermarket, Performance and Add-On Parts Regulations

This page last reviewed November 19, 2018

Certified Auxiliary Fuel Tanks
Auxiliary fuel tanks are subject to California's anti-tampering laws. Installation of auxiliary fuel tanks on emission controlled vehicles is prohibited unless the auxiliary fuel tanks have been evaluated and certified by the Air Resources Board.
Executive Orders for auxiliary fuel tanks that meet OBD II system requirements:

Here is a list of approved auxiliary fuel tanks dated April 1, 1990.