ZRP Std Exhaust Valves Inconel for BMW 3.0L N55 S55

BMW 3.0L N55 / S55 – ZRP Standard Exhaust Inconel Valves (Set of 12)

ZRP Standard Exhaust Inconel Valves are engineered for the BMW 3.0L N55B30 and S55B30 turbocharged engines. Designed to withstand extreme exhaust temperatures and elevated boost pressures, these valves deliver exceptional durability, thermal stability, and consistent performance in both high-performance street builds and professional motorsport applications.

Manufactured from premium nickel-based superalloys (Inconel 751 / 600 series), ZRP exhaust valves maintain structural integrity at exhaust gas temperatures exceeding 800°C. They are specifically developed for extreme-duty environments where conventional stainless-steel valves cannot tolerate the thermal and mechanical loads generated by modern high-output turbocharged inline-six engines.

Each valve is precision CNC-machined, swirl-polished, and heat-treated to ensure outstanding dimensional accuracy, optimized surface finish, and resistance to thermal fatigue. Strict tolerances for stem straightness, concentricity, and sealing surfaces guarantee reliable combustion sealing and stable operation at sustained high RPM and boost levels.

Technical Features

• Material: Nickel-based superalloy (Inconel 751 / 600 series)

• Heat Resistance: Maintains strength at exhaust gas temperatures above 800°C

• Manufacturing Process: Precision CNC machining, swirl polishing, and heat treatment

• Dimensional Precision: Tight tolerances for stem straightness, concentricity, and sealing surfaces

Advantages

• Reduced stem-to-guide friction for lower wear

• Improved high-RPM and high-boost stability

• Significantly longer service life compared to untreated stainless-steel valves

• Reliable sealing in turbocharged and naturally aspirated configurations

• Suitable for high-performance street, track, and endurance racing applications

Additional Information

• Set Quantity: 12 valves

• Material: Inconel

• Valve Size: 28.00 mm / 5.95 mm / 112.90 mm

• Engine Codes: N55B30, S55B30