Supertech Nissan 5.5mm Valve Stem Seal - Set of 8

This is a set of eight 5.5mm valve stem seals from Supertech, designed for various Nissan engines. Valve stem seals are crucial for preventing oil from leaking down the valve guides into the combustion chamber. When these seals wear out, you might notice blue smoke from your exhaust, especially after the engine has been sitting for a while or when you first start it up. Replacing them is a common part of engine rebuilding or top-end service to ensure proper oil control and a cleaner burn.

This set includes eight seals, which is typically enough for a four-cylinder engine, or you might need multiple sets for larger engines. The 5.5mm size refers to the inner diameter of the seal where it fits onto the valve stem. Supertech is known for making well-built engine components, and these seals are made to be a direct replacement for the original equipment, making installation straightforward when the cylinder head is off the engine.