4pc Car Engine Piston & Rings Kit 12578324 12578326 12621251 12659419 89018112 for - Captiva Cobalt Equinox HHR Impala 2.4L This piston and rings kit is designed for use with select vehicle models including Captiva, Cobalt, Equinox, HHR, and Impala equipped with a 2.4L engine.The set includes four pistons and matching rings, engineered for a fit and engine . The cylinder bore diameter is 88 mm.The kit contains three types of rings: compression ring sized at 88 x 1.20 mm, second ring at 88 x 1.50 mm, and oil ring at 88 x 2.50 mm.This configuration supports effective sealing and consistent under normal driving conditions. Compatibility is d through direct interchange with part numbers 12578324, 12578326, 12593744, 12593745, 12603910, 12608531, 12609858, 12616970, 12621251, 12631102, 12631103, 12631967, 12643172, 12646457, 12657184, 12659419, 12665165, 12784490, 19180835, 19180836, and 89018112.The design allows for straightforward installation as a direct replacement, requiring no special tools or modifications. Constructed for and consistent function, this kit supports proper piston movement and ring seating within the cylinder block, contributing to overall engine efficiency.It is suitable for use in repair and rebuild projects by both professional technicians and experienced DIY users. Compatibility Advisory: This product is not affiliated with the manufacturer.Brand mentions are for fitment reference only.