Supertech Nissan RB20 (w/Hydraulic Lifter) Inconel Exhaust Valve - +1mm Oversize - Set of 12

If you're rebuilding the top end of your Nissan RB20 engine, especially for high-performance applications where heat and stress are significant factors, a set of Supertech Inconel exhaust valves is a smart choice. These valves are specifically designed to handle the extreme temperatures found in the exhaust port, helping to maintain engine integrity under demanding conditions. The +1mm oversize is ideal for engines that have been bored or require a larger valve for improved flow, making them a key component for serious engine builds.

Supertech uses Inconel, a high-nickel, high-chromium superalloy, for these exhaust valves. This material is exceptionally resistant to heat and corrosion, which is critical for exhaust components that endure constant exposure to hot combustion gases. The +1mm oversize means these valves are slightly larger in diameter than stock, which can increase airflow into the cylinder, potentially leading to improved performance. This set includes 12 valves, covering all exhaust ports for your RB20 engine, and they are designed to work with hydraulic lifters, simplifying installation in compatible RB20 heads.

When installing these valves, ensure your cylinder head is properly prepared and that the valve guides are honed to the correct size for the +1mm stems. Using the correct valve seat inserts compatible with Inconel is also important for longevity and proper sealing. This set is a solid option for anyone looking to build a robust and reliable RB20 engine that can withstand the rigors of performance driving.