ZRP Std Exhaust Valves Inconel for Audi VW Volkswagen 2.5L TFSI TT-RS RS3 EA855

Audi / VW 2.5L TFSI (EA855) TT-RS / RS3 / Q2 RS – ZRP Standard Inconel Exhaust Valves (Set of 10)

ZRP Standard Inconel Exhaust Valves are engineered for high-performance Audi and Volkswagen 2.5L TFSI EA855 engines used in the TT-RS, RS3, and Q2 RS models. Designed to withstand extreme exhaust temperatures and elevated cylinder pressures, these valves deliver exceptional durability, thermal stability, and long-term reliability in demanding 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 use, where conventional stainless-steel valves cannot tolerate the required thermal and mechanical loads. This makes them an ideal solution for turbocharged engines, high-boost builds, and endurance racing environments.

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 use

Additional Information

• Set Quantity: 10 valves

• Material: Inconel

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

• Engine Codes (EA855): CEPA, CEPB, DNWA, CZGB, CTSA, CZGA, DAZA

• Applications: 2.5L TFSI EA855 – TT-RS, RS3, Q2 RS