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 a variety of vehicles including Captiva, Cobalt, Equinox, HHR, and Impala equipped with a 2.4L engine. The set includes four pistons and matching ring sets, each configured for an 88 mm cylinder bore. Ring specifications include a compression ring sized at 88 x 1.20 mm, a second ring at 88 x 1.50 mm, and an oil control ring measuring 88 x 2.50 mm. The components are engineered for direct replacement installation, allowing for straightforward servicing without the need for specialized tools. This kit corresponds to multiple part numbers such as 12578324, 12578326, 12621251, 12659419, and 89018112, offering compatibility across various applications. Designed for durability and consistent engine performance, the kit supports proper compression and oil control when installed correctly. This is a non-OEM replacement. Any mention of brand names is strictly for compatibility clarification.