Dinex Diesel Oxidation Catalysts (DOCs) are engineered to meet the demanding requirements of EPA 1-21 aftertreatment systems for Class 6-8 trucks and buses. As an OEM manufacturer with decades of experience supplying leading truck manufacturers worldwide, Dinex brings that same expertise to every aftermarket DOC. The DOC plays a critical role in the aftertreatment system—burning a wide range of pollutant gases in the exhaust stream while supporting the DPF by helping it burn off trapped particles during regeneration. A failed DOC can lead to significantly more frequent active regenerations, higher fuel consumption, and costly downtime. In many cases, root causes include EGR coolant leaks or insufficient air supply. Every Dinex DOC features industry-standard metallic or ceramic cores engineered for the highest performance standards. Metallic and ceramic options are tailored to deliver the best performance for your specific vehicle application. We continuously innovate and improve our catalytic properties to deliver the best balance between performance and price. All DOCs come complete with the clamps and gaskets needed for proper installation. With a standard 3-year warranty and coverage across all major makes and models—including Cummins, Freightliner, Peterbilt, Kenworth, Volvo, Mack, and International—Dinex DOCs offer reliable, cost-effective performance that keeps your fleet EPA-compliant and back on the road faster.

• OE-grade ceramic or metallic catalyst core
• optimized PGM loading
• clamps & gaskets included
• supports DPF regeneration
• EPA 1-21 compliant
• 3-yr warranty
• all major truck & bus makes