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Buyer Beware!
Buyer Beware! - Currently, only retrofits that are verified by ARB to reduce particulate matter emissions by 85 percent can be used to upgrade an existing truck to comply with diesel truck regulations. Certified products cannot be used to comply.

For more detailed information, please visit our Verification Procedure page or our List of Verified diesel emissions reduction strategies. Executive orders for ARB-verified devices begin with the letters DE.