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PRODUCT DESCRIPTION
Product details
ZRP +1.0 Inconel Exhaust Valves for Audi/VW 3.0L Twin-Turbo RS4/RS5 (EA839) (Set of 12)
ZRP +1.0 Inconel Exhaust Valves are designed for the Audi 3.0L Twin-Turbo EA839 engine, found in RS4 and RS5 Quattro models. Engineered for high-boost, high-performance applications, these oversized exhaust valves offer exceptional thermal stability, durability, and consistent performance under extreme conditions.
Crafted 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 standard stainless steel valves fail to withstand the required thermal and mechanical loads.
The +1.0mm oversized valve head enhances exhaust flow, making them ideal for upgraded turbo setups, ported cylinder heads, and high-performance builds focused on maximum efficiency and power. Each valve is precision CNC machined, swirl-polished, and heat-treated to ensure superior dimensional accuracy, a flawless surface finish, and high resistance to thermal fatigue. Strict tolerances for stem straightness, concentricity, and sealing surfaces guarantee reliable combustion sealing and stable operation at high RPMs. Technical Features
Material: Nickel-based superalloy (Inconel 751 / 600 series)
Oversize: +1.0mm valve head diameter
Heat Resistance: Maintains strength above 800°C
Manufacturing Process: Precision CNC machining, swirl polishing, and heat treatment
Dimensional Accuracy: Strict straightness and concentricity tolerances
Advantages
Increased exhaust flow potential
Reduced stem-to-guide friction
Extended lifespan compared to stainless steel valves
Reliable sealing in high-performance turbocharged engines
Suitable for track, endurance, and high-power builds
Additional Information
Set Quantity: 12 valves
Material: Inconel
Valve Size: 29.00mm (+1.0mm) / 5.96mm / 101.75mm
Engine: Audi RS4 / RS5 3.0L Twin-Turbo Quattro EA839
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