Supertech Toyota 1GRFE Black Nitrided Exhaust Valve- +1mm Oversize - Single

The black nitriding treatment on this Supertech exhaust valve is a key detail. It hardens the surface, making it more resistant to wear and heat, which is crucial for an exhaust valve that sees high temperatures and constant movement. This particular valve is also +1mm oversize, meaning it's designed to replace a stock valve that has been slightly worn or to achieve a specific performance goal in an engine rebuild.

When you're working on the top end of a Toyota 1GRFE engine, especially if you're rebuilding or refreshing the cylinder heads, using valves like these from Supertech makes a difference. The +1mm oversize means it's intended to be used with a cylinder head that has been machined to accept the larger valve. This can help improve sealing and potentially airflow if the valve seat is also properly prepared.

This listing is for a single exhaust valve. Make sure to count how many you need for your specific engine build, as it's common to replace all exhaust valves when rebuilding an engine.