Supertech Subaru EJ25 / Toyota 3SGTE/4AGE 16V 6mm Polyacrylic Intake Valve Stem Seal - Set of 8

If you're rebuilding the top end of your Subaru EJ25 or Toyota 3SGTE/4AGE 16V engine, replacing the valve stem seals is a critical step. These seals sit on the valve guides and keep oil from leaking down into the combustion chamber when the valve is closed. Worn-out seals are a common cause of blue smoke on startup and increased oil consumption.

This set from Supertech uses polyacrylic material, which holds up well to engine temperatures and provides a good seal. They are designed for a 6mm valve stem, which is common on these popular performance engines. Installing new seals ensures that your engine runs cleaner and uses oil more efficiently, which is especially important when you're aiming for optimal performance after a rebuild.