Supertech Audi/VW 2.5T FSI Black Nitrided Intake Valves 33.85mm(std) Head Dia. - Set of 10

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

• 33.85 mm head (standard size) – drops straight into factory seats; no machining required.

• Black Nitride coating (~52 HRC) hardens the surface and lowers stem-to-guide friction, extending service life at high RPM.

• One-piece forged EV8 construction – no weld seams; excellent fatigue resistance under aggressive tuning.

• Triple-groove keeper design secures valve locks even at extreme engine speeds.

• Super-finished stem dramatically reduces roughness, minimising guide wear and improving airflow.

Technical Specifications

Engine Compatibility

• Audi RS3 (8P / 8V / 8Y)

• Audi TT RS (8J / 8S)

• Audi RS Q3

• Other VW-Group models using the 2.5 T FSI five-cylinder (codes DAZA, DAZC, CZGB)