Supertech Honda/Acura K20/K24 Black Nitrided Exhaust Valve - +0.5mm Oversize - Single (D/S Only)

This Supertech exhaust valve is black nitrided, a surface hardening process that makes the valve face tougher and more resistant to wear. It's designed as a +0.5mm oversize replacement, meaning it's slightly larger than the stock valve. This can be useful when rebuilding an engine, especially if the valve seats have been reconditioned or if you're looking to restore original performance after wear.

The black nitride treatment not only improves hardness but also offers some corrosion resistance. This valve is intended for single exhaust valve applications, often found in specific cylinder head configurations for Honda and Acura K-series engines like the K20 and K24. When you're rebuilding the top end, using valves with the correct dimensions and a durable surface treatment helps ensure a good seal and long service life.