The 11.08 Inch Cummins ISL Diesel Oxidation Catalysts with 11.74 Inch Diameter are a high-quality, environmentally friendly solution for reducing harmful exhaust emissions. Constructed from stainless steel, these catalysts are durable and effective, providing a direct OE replacement for most Cummins ISL models. With reduced backpressure and fuel consumption, they offer practical benefits for vehicle performance and environmental impact. Each catalyst comes with clamps and gaskets included, and is manufactured according to OE technology, ensuring a perfect match to OE performance standards. This product meets EPA07 exhaust emission norms and is available under OE replacement numbers 2871929NX, 2871929RX, 2871929, and OTR58073.