Supertech Subaru EJ25 2.5L Inconel Exhaust Valve - +1mm Oversize - Set of 8

This is a set of eight Supertech Inconel exhaust valves designed specifically for Subaru EJ25 2.5L engines. These valves are 1mm oversize, which can be beneficial when rebuilding or modifying an engine to ensure a proper seal and optimal performance. The Inconel material is chosen for its exceptional strength and resistance to high temperatures, making it ideal for the demanding environment of an exhaust port.

When you're working on the top end of an EJ25, especially if it's seen high mileage or is being built for more power, replacing the exhaust valves is a critical step. These Supertech valves are made from Inconel, a nickel-chromium-based superalloy known for its ability to withstand extreme heat and stress without deforming. This is important because exhaust valves operate under intense thermal loads. The +1mm oversize dimension means these valves are slightly larger than stock, which is often used to compensate for wear on the valve seat or to achieve a better seal in a performance application. It's important to ensure your cylinder heads are machined to accept this oversize dimension before installation.

This set includes all eight exhaust valves needed for a complete engine build. Proper installation will involve ensuring the valve guides are honed to the correct size for the +1mm valves and that the valve seats are cut to match. Always refer to the manufacturer's installation instructions for specific details regarding your engine build.