Blow Off Valve for Audi A3 S3 A4 A6 A8 TT 25mm Aluminum
The PQY Universal 25mm Aluminum Blow Off Valve is built for high-performance turbocharged engines, delivering precise boost control and a satisfying turbo flutter sound for the Audi A3, A3 S3, A4, A6, A8, and TT lineups, as well as a wide range of other 25mm fitment platforms. Crafted from durable high‑quality aluminum alloy, this valve helps manage compressor surge, improves throttle response, and reduces intake backflow during rapid gear changes. The design is compatible with 1.8T turbo setups and can also be used across a broad spectrum of vehicles that use a 25mm port. The valve is adjustable on the fly—simply turn the top to set spring pressure while the engine is running—so you can dial in the perfect boost behavior for each driving situation. It can vent to atmosphere, recirculate, or do both, giving you the option of a sportier sound or a stealthier, quieter operation. Each unit undergoes 100% factory testing to ensure reliable performance from installation to road use.
Benefits & Tips
- On‑the‑fly adjustment: fine‑tune spring pressure without removing the valve, matching boost levels as your setup evolves.
- Vent options: choose atmospheric venting for a pronounced turbo sound, recirculation for a quieter, drivetrain-friendly profile, or both for a custom blend.
- Wide compatibility: designed for 25mm ports and compatible with Audi A3, S3, A4, A6, A8, TT 1.8 20v, plus a broad range of other vehicles like Golf, Polo, Passat, Seat Leon, Ibiza, Cupra, and more.
Product specifications
- Brand: PQY
- Model: PQY5742BK
- Item Type: Turbo Blow Off Valve / Diverter Valve
- Material: High Quality Aluminum Alloy
- Port Size: 25.0 mm (1 inch)
- Weight: 209 g (0.461 lb)
- Color: Black
- Application: Universal 25 mm fitment; suitable for Audi A3, S3, A4, A6, A8, S4, TT 1.8 20v and many other turbo systems
- Displacement: 0
- Cylinder Count: 4 Cylinder
- OEM No.: for Audi A3 S3 A4 A6 A8 S4 TT 1.8 20v
- Origin: Mainland China
- Certification: ISO9000 (factory tested)
- Note: Universal 25mm port configuration
Package includes:
- 1x 25mm Dual Dump Valve
- 2x Flexible Pipe
- 2x Nipples
- 2x Clips
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