This listing is for a set of four TRW CB1228P connecting rod bearings, designed for use in standard 77-90 GM 181, 196, 204, 231, and 252 engines. These bearings are made from high-quality materials to ensure long-lasting performance and reliability. They are compatible with a variety of engine types and are easy to install, making them a great choice for anyone in need of engine bearings. Please note that this item does not come with any additional accessories or fittings, so be sure to consult your owner's manual or mechanic if you are unsure about installation.