Supertech Nissan 240SX KA24DE Black Nitrided Exhaust Valve - +0.5mm Oversize - Set of 8

The black nitriding treatment on these Supertech exhaust valves is a key detail, creating a harder surface that resists wear and improves durability in the high-heat environment of your engine. These are specifically made for the Nissan 240SX with the KA24DE engine, and they come in a set of eight, ready to replace all your exhaust valves. They are also +0.5mm oversize, which is important if you're rebuilding or refreshing your engine and need to account for worn valve seats or a slightly larger valve for improved flow.

Supertech is known for making well-built internal engine components, and these valves are no exception. The nitriding process not only adds hardness but also helps with oil retention, which is beneficial for smooth operation and longevity. Because they are an oversize part, they are intended for engine rebuilds where the valve seats might have been reconditioned or bored out to match the larger diameter. This ensures a proper seal and can contribute to improved compression and performance after the rebuild is complete.