Supertech Honda/Acura K20/F20 Black Nitrided Exhaust Valve - +1mm Oversize - Single (Drop Ship Only)

This is a single Supertech black nitrided exhaust valve, specifically designed as a +1mm oversize replacement for Honda/Acura K20 and F20 engines. If you're rebuilding the top end of one of these popular engines, these valves are a well-built choice to consider for improved flow and durability.

The black nitriding process hardens the valve surface, making it more resistant to wear and heat. This is particularly important for exhaust valves, which experience higher temperatures than intake valves. Being 1mm oversize means these valves have a slightly larger diameter than stock, which can help improve airflow into the combustion chamber when paired with appropriate porting. This part is sold individually, so be sure to order the correct quantity for your engine's cylinder head.