ZRP Std Exhaust Valves for Audi VW Volkswagen 3.0L Turbo RS4 RS5 EA839

Audi / VW 3.0L Twin-Turbo RS4 / RS5 (EA839) – ZRP Standard Exhaust Inconel Valves (Set of 12)

ZRP Standard Exhaust Inconel Valves are engineered for the Audi 3.0L Twin-Turbo EA839 engine used in the B9 RS4 and RS5 Quattro models. Designed to withstand extreme exhaust temperatures and elevated boost pressures, these valves deliver exceptional durability, thermal stability, and consistent performance in high-performance street and motorsport 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-duty environments where conventional stainless-steel valves cannot tolerate the required thermal and mechanical loads.

Each valve is precision CNC-machined, swirl-polished, and heat-treated to ensure superior dimensional accuracy, surface finish, and resistance to thermal fatigue. Tight tolerances for stem straightness, concentricity, and sealing surfaces guarantee 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 above 800°C

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

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

Advantages

• Reduced stem-to-guide friction for lower wear and improved high-RPM stability

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

• Reliable sealing in both naturally aspirated and turbocharged engines

• Designed for high-performance street, track, and endurance motorsport builds

Additional Information

• Set Quantity: 12 valves

• Material: Inconel

• Valve Size: 28.00 mm head / 5.96 mm stem / 101.75 mm length

• Engine: Audi RS4 / RS5 3.0L Twin-Turbo Quattro EA839

• Application: Audi RS4 3.0L 24V EA839 (B9), Audi RS5 3.0L 24V Turbo Quattro