Supertech Subaru EJ20/EJ25 Inconel Exhaust Valve - +1mm Oversize - Set of 8

If you're rebuilding the top end of your Subaru EJ20 or EJ25 engine, especially for boosted applications, you'll want to consider these Supertech Inconel exhaust valves. These are designed to handle the extreme heat and stress that performance Subaru engines are known for, offering a significant upgrade over stock components. They are built to last in demanding conditions, ensuring your engine performs reliably under pressure.

These valves are made from Inconel, a high-nickel alloy known for its exceptional strength and resistance to high temperatures and corrosion. This makes them ideal for turbocharged or supercharged engines where exhaust gas temperatures can get very high. The +1mm oversize design means they are slightly larger than stock, which can help improve sealing and potentially increase flow when paired with appropriate cylinder head work. This set includes all 8 exhaust valves needed for a complete engine build.

When installing these, remember they are a direct replacement for your stock valves, but ensure your valve guides and seats are in good condition to match the new valve size and material. Proper installation is key to unlocking their full potential and ensuring long-term reliability for your performance Subaru.