Supertech Audi/VW 2.5T FSI Inconel Exhaust Valve 28.00mm (std) Head Dia. - Set of 10
Supertech VWEVI-1002T-10 – Inconel Exhaust Valve Set (VW/Audi 2.5 T FSI, 28 mm)
Supertech VWEVI-1002T-10 is a set of ten heat-resistant exhaust valves designed for Audi/VW 2.5 T FSI five-cylinder engines (DAZA, DAZC, CZGB – e.g., RS3, TTRS, RS Q3). Forged from Inconel/Nimonic alloy, they cope with extreme exhaust-gas temperatures typical of high-boost turbo applications while maintaining low mass and excellent durability.
Key Features
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Standard 28 mm head diameter – direct drop-in for factory seat size, no machining required.
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Inconel-Nimonic alloy withstands > 900 °C without strength loss, ideal for aggressive tuning and prolonged track use.
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Single-groove keeper (triple-groove optional in the “T” version) offers secure valve-lock engagement for high-RPM stability.
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One-piece forged, non-magnetic construction eliminates weak weld seams and improves fatigue resistance.
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CNC “super-finished” stem (≈ 1/3 the roughness of standard valves) reduces guide wear and friction.
Technical Specifications
| Parameter | Value |
|---|---|
| Set quantity | 10 valves |
| Valve type | Exhaust |
| Head diameter | 28.00 mm (STD) |
| Stem diameter | 5.96 mm |
| Overall length | 101.8 mm |
| Material | Inconel-Nimonic alloy |
| Groove style | Triple groove (-T) |
| Surface hardness | ≥ 52 HRC (nitrided tip) |
| Part number | VWEVI-1002T-10 |
Compatibility
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Audi RS3 8P/8V/8Y
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Audi TTRS 8J/8S
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Audi RS Q3
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Other VW Group vehicles equipped with the 2.5 T FSI 20V five-cylinder (EA855/EA855 evo) engines.