Supertech Toyota Supra 2JZ Black Nitrided Exhaust Valve - +1mm Oversize - Single

This listing is for a single Supertech exhaust valve designed for the Toyota Supra 2JZ engine. It's a +1mm oversize valve, meaning it's slightly larger than the stock diameter. This can be beneficial when rebuilding or modifying your engine's cylinder head, especially if you're looking to improve airflow or replace worn components. The valve features a black nitrided surface treatment, which helps to reduce friction and improve wear resistance in the valve guide and seat.

The black nitride coating is a popular choice for performance engine builds because it creates a very hard surface that can withstand the high temperatures and stresses found in the exhaust port. This treatment also helps to prevent corrosion. When installing these, remember they are a +1mm oversize, so ensure your valve guides are properly sized or reamed to accommodate the larger diameter for a precise fit and optimal sealing.