Piston Ring Set, 4.000" Bore

The Sealed Power E-921K Piston Ring Set is engineered for performance and reliability in 8-cylinder engine rebuilds. Designed with a 4.000-inch bore and a drop-in fit, these rings ensure precise sealing and efficient operation. The top ring is constructed from durable steel and features a state-of-the-art Plasma-Moly coating, which significantly decreases friction and provides exceptional resistance to scuffing. The set includes rings with exacting tolerances, including a 1.5mm top ring thickness, a 1.5mm second ring width, and a 3-piece oil ring design, all with standard tension. These performance-grade piston rings are built to meet or exceed OEM specifications, ensuring they can accommodate engines that require repowering due to wear. The application-engineered design and rigorous validation processes by Sealed Power's engineers guarantee that these parts uphold the highest industry standards, making them a reliable choice for both DIY enthusiasts and professional mechanics. This piston ring set is specified to fit various General Motors vehicles, including 2003-2006 Cadillac Escalade ESV, 2002-2006 Cadillac Escalade EXT, 2006-2007 Cadillac CTS, 1999-2000 Cadillac Escalade, 2002-2006 Cadillac Escalade, and 2005-2006 Chevrolet SSR. It is also compatible with certain 2007 Chevrolet Silverado 2500 HD Classic models. Before purchasing, it is crucial to verify fitment using the "Amazon Confirmed Fit" tool and check any applicable qualifier notes for your specific vehicle year, make, model, engine, and trim.