Supertech Subaru EJ20/EJ25 Black Nitrided Exhaust Valve - +0.5mm Oversize - Set of 8

This set includes eight Supertech black nitrided exhaust valves, each measuring 0.5mm oversize. These valves are specifically made for Subaru EJ20 and EJ25 engines, which are common in many performance and enthusiast Subaru models. When you're rebuilding or upgrading the top end of your engine, new valves are a critical component to ensure proper sealing and airflow.

The black nitriding process on these valves makes the surface harder and more resistant to wear, which is important for longevity, especially in high-performance applications. The +0.5mm oversize dimension means these valves are slightly larger than stock, which can be beneficial when you're re-boring cylinders or if the valve seats have been modified. This allows for a fresh, tight seal and can help restore compression in engines that have seen significant use.