Supertech VWIVN-1002T-10 – Black-Nitrided Intake Valve Set (VW/Audi 2.5 T FSI)
Supertech’s VWIVN-1002T-10 kit supplies ten OE-size intake valves (Ø 33.85 mm) for the five-cylinder 2.5 T FSI EA855 / EA855 Evo engine found in the Audi RS3, TT RS and RS Q3. Each valve is forged from EV8 (21-4N) stainless steel and finished with a hard, low-friction Black Nitride surface for superior durability under elevated boost and temperature.
Key Features
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33.85 mm head (standard size) – drops straight into factory seats; no machining required.
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Black Nitride coating (~52 HRC) hardens the surface and lowers stem-to-guide friction, extending service life at high RPM.
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One-piece forged EV8 construction – no weld seams; excellent fatigue resistance under aggressive tuning.
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Triple-groove keeper design secures valve locks even at extreme engine speeds.
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Super-finished stem dramatically reduces roughness, minimising guide wear and improving airflow.
Technical Specifications
| Parameter | Value |
|---|---|
| Valve type | Intake |
| Head diameter | 33.85 mm (STD) |
| Stem diameter | 5.96 mm |
| Overall length | 101.8 mm |
| Material | EV8 (21-4N) stainless steel |
| Surface treatment | Black Nitride |
| Keeper style | Triple groove |
| Valves per kit | 10 |
Engine Compatibility
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Audi RS3 (8P / 8V / 8Y)
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Audi TT RS (8J / 8S)
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Audi RS Q3
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Other VW-Group models using the 2.5 T FSI five-cylinder (codes DAZA, DAZC, CZGB)
SUPERTECH
Supertech Audi/VW 2.5T FSI Black Nitrided Intake Valves 33.85mm(std) Head Dia. - Set of 10
Tags: Engine\By Car Make\Audi\2.5 V5 TFSI,