Supertech Toyota Yaris / Echo 4AGE 20V 5mm Viton Exhaust / Intake Valve Stem Seal - Set of 8

This set includes eight Supertech valve stem seals, specifically designed for the 5mm stem size found on 4AGE 20V exhaust and intake valves. These seals are made from Viton, a material known for its excellent resistance to heat and oil, which is crucial for maintaining engine health and preventing oil consumption.

When you're rebuilding the top end of your Toyota Yaris or Echo with the 4AGE 20V engine, replacing these seals is a key step. They sit on the valve guides and prevent excess oil from seeping down into the combustion chamber past the valve stem. Using Viton seals helps ensure a good seal even under the high temperatures present in the exhaust ports, and their durability means they'll hold up well over time.