Supertech Mazda/Ford Duratec 2.0L/2.3L Inconel Exhaust Valve - +1mm Oversize - Single (D/S Only)

If you're rebuilding the top end of your Mazda or Ford with a Duratec 2.0L or 2.3L engine, especially for high-performance applications, you'll want to consider these Supertech Inconel exhaust valves. These are designed to handle the extreme heat and stress that exhaust valves endure, making them a solid choice for boosted or track-focused builds.

What sets these valves apart is the Inconel material. It's a superalloy known for its exceptional resistance to high temperatures and corrosion, which is crucial for exhaust valves that sit right in the path of hot combustion gases. This particular valve is 1mm oversize, which can help improve sealing and performance when used with a freshly machined valve seat. It's also specified as 'D/S Only,' meaning it's for the 'Desmodromic' or 'Dual Spring' setup, so make sure that matches your application.

When installing these, remember they are a direct replacement for the stock valve but are an oversize fit. You'll need to ensure your valve guides and seats are properly prepared to accept the larger diameter for optimal performance and longevity. Always refer to your engine's service manual for the correct installation procedures.