This valve stem and valve oil seals are specifically designed to fit Cummins engines. They are a high-quality replacement part that will ensure the proper functioning of your engine's valves. Made in China, these seals are manufactured to meet the OE/OEM part number 3927042. Whether you are restoring a vintage motorcycle or repairing a modern Cummins engine, these seals are a necessary component. They are unit type seals that are designed for easy installation and provide reliable sealing to prevent oil leaks. Purchase this set from eBay Motors today and keep your engine running smoothly.