Supertech Performance NEVI-1052-12 Inconel Exhaust Valves Nissan RB25DET +1mm Oversize

These valves feature a +1mm oversize head diameter (30.65mm) designed for enhanced airflow in ported cylinder head applications.

Key Specifications:

• Head Diameter: 30.65mm (+1mm oversize)
• Stem Diameter: 5.94mm
• Overall Length: 89.0mm
• Material: Inconel 751 nickel-based superalloy

Performance Benefits:

• Superior high-temperature strength and oxidation resistance for turbocharged and supercharged applications
• Exceptional durability under sustained high exhaust gas temperatures
• One-piece forged construction for maximum strength and reliability
• CNC finished to strict tolerances for precise valve seat geometry and sealing
• Ideal for high-RPM, high-horsepower builds and endurance racing applications

Inconel material provides significantly better hot strength compared to standard stainless steel exhaust valves, making these valves essential for engines running elevated boost levels or extended competition use. The oversized head diameter increases flow potential when matched with properly ported cylinder heads and valve seats.

Note: Oversize valves require proper valve seat machining to accommodate the larger head diameter. Professional installation and proper valve spring selection are recommended to ensure optimal performance and valve train control at high RPM.