Supertech Nissan RB25 Inconel Exhaust Valve- +1mm Oversize - Set of 12

If you're rebuilding the top end of your Nissan RB25 engine, especially for performance applications, these Supertech Inconel exhaust valves are a solid choice. They are designed to handle the higher temperatures and stresses that come with boosted or high-RPM operation. The +1mm oversize helps restore compression and can improve flow when used with ported cylinder heads.

These valves are made from Inconel, a high-nickel, high-chromium superalloy known for its exceptional strength and resistance to extreme heat and corrosion. This material is crucial for exhaust valves, as they endure the hottest gases exiting the combustion chamber. The +1mm oversize means these valves are slightly larger in diameter than stock, which is typically done to improve sealing and airflow when the valve seats have been reconditioned or replaced to accommodate the larger size.

This set includes 12 valves, enough for a complete RB25 engine. When installing, ensure your valve guides and seats are properly machined to accept the +1mm size for optimal performance and sealing.