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PRODUCT DESCRIPTION
Product details
ZRP Inconel Standard Exhaust Valves for BMW 3.0L N55 / S55 (Set of 12)
ZRP Inconel Standard Exhaust Valves are engineered for BMW 3.0L N55B30 and S55B30 turbocharged engines. Designed to withstand extreme exhaust temperatures and high boost pressures, these valves offer exceptional durability, thermal stability, and consistent performance in both high-performance street vehicles and professional racing applications.
Manufactured from premium nickel-based superalloys (Inconel 751 / 600 series), ZRP Inconel exhaust valves maintain structural integrity at exhaust gas temperatures exceeding 800°C. They are specifically developed for extreme operating environments where conventional stainless steel valves cannot withstand the thermal and mechanical loads generated by modern high-performance inline-six turbocharged engines.
Each valve is precision CNC machined, swirl polished, and heat-treated to ensure exceptional dimensional accuracy, an optimized surface finish, and resistance to thermal fatigue. Strict tolerances for straightness, concentricity, and stem sealing surfaces ensure reliable combustion sealing and stable operation at high RPMs and sustained boost levels. Technical Features
Material: Nickel-based superalloy (Inconel 751 / 600 series)
Heat Resistance: Maintains strength at exhaust gas temperatures exceeding 800°C
Manufacturing Process: Precision CNC machined, swirl polished, and heat-treated
Dimensional Accuracy: Strict tolerances for stem straightness, concentricity, and sealing surfaces
Advantages
Reduced stem-to-guide friction for less wear
Increased stability at high RPMs and high boost pressure
Significantly longer lifespan compared to untreated stainless steel valves
Reliable sealing in both turbocharged and naturally aspirated setups
Suitable for high-performance street, track, and drag racing applications
Additional Information
Set Quantity: 12 valves
Material: Inconel
Valve Size: 28.00mm / 5.95mm / 112.90mm
Engine Codes: N55B30, S55B30
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