Power Products Unlimited, Inc., dba Diesel Power Products Settlement
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Power Products Unlimited, Inc., dba Diesel Power Products, Settles For $160,000
In March 2026, the California Air Resources Board (CARB) reached a settlement with Power Products Unlimited, Inc., dba Diesel Power Products (Power Products), with its principal location in Spokane Valley, Washington, for the company’s violations of CARB’s Add-On Parts and Modified Parts Regulation (Aftermarket Parts Regulation), under California Code of Regulations, title 13, section 2222, and Vehicle Code section 27156.
An investigation conducted by CARB staff revealed that Power Products sold automotive aftermarket performance parts without legal exemptions to California’s anti-tampering laws. Such parts replace or modify vehicle critical original equipment manufacturer (OEM) emissions control system components and OEM specified engine-operating conditions, and thus, must be evaluated by CARB to demonstrate the vehicle’s continued emissions compliance to qualify for legal exemption.
To settle the case, Power Products agreed to the penalty of $328 per aftermarket part in violation for a total settlement of $160,000. The total settlement amount will be deposited into CARB’s Air Pollution Control Fund, which provides funding for projects and research to improve California's air quality.
Power Products fully cooperated with CARB to resolve this matter, and has agreed to not sell, offer for sale, or advertise in California, any non-exempted aftermarket parts and to comply with all regulatory requirements.