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PRODUCT DESCRIPTION
Product details
ZRP +1.0 Inconel Exhaust Valves for Audi/VW 2.5L TFSI (EA855) TT-RS/RS3 (Set of 10)
ZRP +1.0 Inconel Exhaust Valves are engineered for high-performance Audi and Volkswagen 2.5L TFSI EA855 engines, found in TT-RS and RS3 models. Designed to withstand extreme exhaust temperatures and high cylinder pressures, these oversized exhaust valves offer exceptional strength, thermal stability, and long-term reliability in demanding street and racing applications.
Crafted from premium nickel-based superalloys (Inconel 751/600 series), ZRP exhaust valves maintain their structural integrity at exhaust gas temperatures exceeding 800 °C. Developed for heavy-duty use, they are ideal for high-boost turbocharged engines, upgraded cylinder heads, and endurance racing environments where conventional stainless steel valves are no longer sufficient. Each valve is precision CNC machined, swirl polished, and heat-treated to ensure excellent dimensional accuracy, an impeccable 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 Specifications
Material: Nickel-based superalloy (Inconel 751 / 600 series)
Oversize: +1.0mm valve head diameter
Heat Resistance: Maintains strength at exhaust gas temperatures exceeding 800 °C
Manufacturing Process: Precision CNC machining, swirl polishing, and heat treatment
Dimensional Accuracy: Strict tolerances for stem straightness, concentricity, and sealing surfaces
Advantages
Increased exhaust flow potential due to larger valve head
Reduced stem-to-guide friction for less wear and improved high-RPM stability
Significantly extended lifespan compared to untreated stainless steel valves
Reliable sealing in high-performance turbocharged applications
Designed for motorsport, drag, and endurance racing vehicles
Additional Information
Set Quantity: 10 Valves
Material: Inconel
Valve Size: 29.00mm head (+1.0mm) / 5.96mm stem / 101.75mm length
Engine Codes: DAZA, DNWA
Application: 2.5L TFSI EA855 – Audi TT-RS, RS3
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