The 41.65 Inch Cummins Selective Catalytic Reduction System is a highly effective and durable solution for reducing exhaust emissions. With a diameter of 13.62 inches, it is designed to fit most Cummins models and is a direct OE replacement for numbers 2871599, 4329017, and OTR58074. Manufactured according to OE technology, this system is made to match OE performance and offers extended lifetime and higher efficiency. Constructed from stainless steel, it comes with clamps and gaskets included for easy installation. Compliant with EPA10 exhaust emission norms, this system is a practical and reliable choice for reducing environmental impact.