This transom housing from Volvo Penta is complete with a small pin and is designed specifically for 4-cylinder engines. It is in great condition and ready to be installed on your boat. The manufacturer part number is 101520438. Made with quality materials, this housing is built to last and provides reliable performance. It is perfect for anyone in need of a replacement or looking to upgrade their boat's transmission and drive parts. This product is a great addition to any boat enthusiast's collection.