Supertech Subaru EJ20/EJ25 Inconel Exhaust Valve - +1mm Oversize - Single (Drop Ship Only)

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. They are designed to handle the extreme temperatures found in performance exhaust systems. These are a +1mm oversize option, meaning they are slightly larger than stock to help improve flow and seal better in the valve seat, which is crucial for maintaining compression and power.

Inconel is a nickel-chromium-based superalloy known for its exceptional strength and resistance to high temperatures and corrosion. This makes it a great material choice for exhaust valves that are constantly exposed to hot combustion gases. The fact that these are a +1mm oversize means they'll require a matching valve seat cut to ensure a proper fit and seal, but this is a common practice when rebuilding performance engines to maximize efficiency.

This listing is for a single valve, so be sure to order the correct quantity for your engine build. It's always a good idea to replace all your exhaust valves when you're doing a rebuild to ensure consistent performance across all cylinders.