The Mahle HS54579 gasket set is designed for use in 6.0L Ford Powerstroke engines. This 20mm dowel head gasket set provides a tight seal between the engine block and cylinder head to ensure smooth and efficient engine operation. Constructed from durable materials, this gasket set is able to withstand the high temperatures and pressures found in an engine. The dowel design allows for easy installation and a secure fit. This gasket set is a reliable replacement or upgrade option for those working on a 6.0L Ford Powerstroke engine. With a one year unlimited mileage warranty, you can trust that it's built to last.