Supertech Subaru WRX 2.0L/2.5L Black Nitrided +1mm Head Diam Exhaust Valve - Set of 8

This set includes eight Supertech black nitrided exhaust valves, each featuring a +1mm larger head diameter. These valves are specifically made for Subaru WRX models with 2.0L or 2.5L engines. Upgrading your exhaust valves can be a key step when rebuilding or modifying your engine's top end, especially if you're looking to improve airflow or handle increased performance demands.

The black nitriding process applied to these valves offers improved surface hardness and wear resistance compared to standard valves. This treatment helps them stand up better to the high temperatures and stresses found in the exhaust port. The +1mm larger head diameter is designed to increase the valve's sealing surface area, which can contribute to better cylinder sealing and potentially improved airflow into the combustion chamber. This makes them a solid option for enthusiasts looking to get more out of their Subaru's engine.

When installing these valves, it's important to ensure your valve guides and seats are in good condition to match the new valve dimensions. Proper installation is crucial for optimal performance and longevity.