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

This is a Supertech Black Nitrided Exhaust Valve, specifically a +1mm oversize version for the driver's side of Mazda and Ford Duratec 2.0L and 2.3L engines. When you're rebuilding the top end of your engine, especially if you're looking to restore performance or handle increased stress, new valves are a critical component. This valve is designed to be a direct replacement, ensuring it fits correctly into the valve seat.

The black nitriding process applied to this valve hardens the surface, which helps improve its resistance to wear and heat. This is important for exhaust valves, as they operate under high temperatures. Being a +1mm oversize valve means it's slightly larger in diameter than the stock valve, which can be beneficial for improving flow when used in conjunction with other engine modifications or for sealing worn valve seats. It's sold individually, so you can purchase exactly the number you need for your specific repair or build.