Ensure reliable exhaust system performance with this Retaining Ring, 1pk, a premium replacement for Cummins 4312298, designed for XPI fuel systems on EPA10/13 Automotive 15-liter ISX/QSX engines in Freightliner Cascadia, Kenworth T680, Peterbilt 389, and Volvo VNL heavy-duty trucks. This retaining ring, measuring 1.12 x 1.12 x 0.37 inches and weighing 0.045 lbs, secures exhaust manifold components, preventing movement and ensuring optimal alignment. Constructed from high-strength materials, it offers durability and corrosion resistance for demanding environments. It fits or replaces Cummins parts 4312298 and 3431556, with no additional cross-references identified. Ideal for fleet maintenance, this retaining ring reduces downtime and costs, ensuring dependable engine operation.