The California Air Resources Board (ARB) regulates aftermarket parts and has promulgated regulations that essentially place all emissions related aftermarket parts into three categories:

(1) Replacement Parts are aftermarket parts that ARB considers to be functionally equivalent to the stock part they are intended to replace. Therefore, it would not impact the emissions from these vehicles. These parts are appropriate for sale and use on automobiles used on or off the public highways. For aftermarket exhaust systems and components, there are two applicable scenarios:

(a) If the automobiles stock exhaust system does not contain a catalytic converter, then an aftermarket exhaust part is a replacement part as long as the part does not remove or replace any emission control equipment originally attached to the stock exhaust system, such as oxygen sensors.

(b) If the automobiles stock exhaust system contains a catalytic converter in the manifold section of the stock exhaust system, then an aftermarket muffler positioned downstream from the catalytic converter (i.e. cat-back) is a replacement part as long as the part does not remove or replace any emission control equipment originally attached to the stock exhaust system.

(2) Executive Order Parts are aftermarket parts that ARB has evaluated and determined do not adversely impact emissions. They are thereby granted an Executive Order (EO), which allows the part to be sold and used on specified automobiles. Any aftermarket exhaust system that replaces or otherwise impacts emission control equipment, including catalytic converters, requires an EO to be sold and used on an automobile used on or off a public highway.

(3) Competition Use Only Parts may not be sold or used on an automobile used on or off the public highways other than those used exclusively for competition. Competition Use Only Parts are aftermarket parts that replace or otherwise interfere with an emission control device, such as a catalytic converter or oxygen sensor. They may be sold and used on an automobile that is used only for closed-course competition.

COMPETITION USE ONLY PARTS ARE FOR USE ONLY IN COMPETITION RACING VEHICLES AS DEFINED UNDER CALIFORNIA LAW, AND ARE NOT LEGAL FOR USE IN ANY OTHER MOTOR VEHICLE.

California law defines a “racing vehicle” as “a competition vehicle not used on public highways.” (Calif. Health & Safety Code 39048) These parts may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event. Competition-only motor vehicles may not be driven to a racing event on a public highway and must be transported on a trailer or other carrier.

USE OF THESE PARTS IN ANY OTHER VEHICLE MAY SUBJECT YOU TO FINES AND PENALTIES FOR VIOLATION OF FEDERAL AND/OR STATE LAW, WILL VOID YOUR WARRANTY FROM THE MANUFACTURER, AND CAN VOID YOUR VEHICLE’S WARRANTY.

It is your responsibility to comply with all applicable federal and state laws relating to the use of these parts.

SupremePower.com hereby disclaims any liability resulting from the failure to use these parts in compliance with all applicable federal and state laws.