ZRP Std Inconel exhaust valves for BMW 1.8L M42

ZRP Inconel standard exhaust valves for BMW 1.8L M42 (Set of 8)

ZRP Inconel standard exhaust valves are designed for the BMW 1.8L M42B18 engine. Engineered to withstand extreme exhaust temperatures and high cylinder pressures, these valves offer exceptional durability, thermal stability, and consistent performance in both high-performance street vehicles and racing applications.

Manufactured from premium nickel-based superalloys (Inconel 751/600 series), ZRP exhaust valves maintain their 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 high-revving naturally aspirated or forced induction engines.

Each valve is CNC-precision machined, swirl-polished, and heat-treated to ensure exceptional dimensional accuracy, 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 RPM. Technical Features

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

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

Manufacturing Process: CNC precision machining, swirl polishing, and heat treatment

Dimensional Accuracy: Strict tolerances for stem straightness, concentricity, and sealing surfaces

Advantages

Reduced friction between stem and guide for lower wear

Increased stability at high RPM

Significantly longer service life compared to untreated stainless steel valves

Reliable sealing in both naturally aspirated and turbocharged engines

Suitable for high-performance road, track, and endurance applications

Additional Information

Set Quantity: 8 valves

Material: Inconel

Valve Size: 30.50 mm / 5.95 mm / 105.65 mm

Engine Code: M42B18