Supertech Honda/Acura K20/K24 Black Nitrided Exhaust Valve - +0.5mm Oversize - Set of 8

These Supertech exhaust valves are black nitrided, a surface hardening process that makes the valve face more durable and resistant to wear. This set includes eight valves, each measuring 0.5mm oversize, which is useful when rebuilding or modifying your Honda or Acura K20 or K24 engine. The oversize dimension helps ensure a good seal in the valve guide and can compensate for wear or slight imperfections in the cylinder head.

The black nitriding treatment not only improves hardness but also helps reduce friction, allowing the valve to move more freely within the valve guide. This can contribute to better engine performance and longevity. Because these are an oversize fit, they are intended for engine rebuilds where the valve seats may have been reconditioned or replaced to accommodate the larger diameter, ensuring a tight seal and optimal compression.

When you're working on the top end of your K-series engine, using well-made components like these valves is important for achieving reliable performance. Make sure to consult your engine's service manual for proper installation procedures and any specific requirements related to using oversize valves during your rebuild.