DPF Alternatives offers complete after-treatment and DPF restorations for all years, makes, and models. We have the only proven method to return your system to factory specifications with our proprietary ultrasonic equipment that utilizes high-frequency sound waves. DPF Alternatives also offers DOC (Diesel Oxidation Catalyst), SCR (Select Catalyst Reduction) and EGR (Exhaust Gas Recirculation) cleanings and restorations. With over 11... Read More about DPF Alternatives Of East Tennessee LLC