GFB Respons Dual Port Variable Blow Off Valve
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GFB Respons Dual Port Variable Blow Off Valve - Ford Falcon XR6 Turbo (BA/BF/FG) / Territory Turbo (SY) / Audi TT/A3/S3 (8N/8L) / VW Golf GTI (Mk4) - Bosch 25mm
GFB pioneered the dual port blow off valve back in 1999, and the Respons TMS takes it further with a patented venting bias adjuster that lets you dial in the exact blow off sound you want, without the stalling or fuelling issues that plague other atmo valves. It's a direct bolt-on replacement for the factory Bosch 25mm valve on the Ford Falcon XR6 Turbo and Territory Turbo.
This listing covers the Ford Falcon XR6 Turbo (BA/BF/FG), Territory Turbo (SY), Audi TT (8N), Audi A3/S3 (8L), and VW Golf GTI (Mk4) — all sharing the same Bosch 25mm valve body. SKU T9025.
Important: The GFB valve must be installed in the opposite orientation to the factory Bosch valve — air enters at the bottom and dumps through the sides.
Key Features
- Adjustable venting bias from full recirculation to full atmosphere
- Balanced piston design holds boost regardless of pressure
- Faster boost recovery on gearshift
- Direct bolt-on, no adaptors or modifications required
- Bosch 25mm valve body replacement
Vehicle compatibility, OEM part numbers, and fitment notes are provided in the tabs above. Please confirm your vehicle's year and turbo configuration before ordering.
Not sure if this valve suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.
Vehicle Compatibility
| Make | Model | Chassis | Engine |
|---|---|---|---|
| Audi | A3 | 8L | - |
| Audi | A4 | B5 | - |
| Audi | A4 | B6 | - |
| Audi | S3 | 8L | - |
| Audi | S4 | B5 | - |
| Audi | TT | 8N | - |
| Ford | Falcon XR6 Turbo | BA/BF | - |
| Ford | Falcon XR6 Turbo | FG | - |
| Ford | Territory Turbo | SY | - |
| Mazda | MX-5 Turbo | NB | - |
| Saab | 9-3 Turbo | - | - |
| Saab | 9-5 Turbo | - | - |
| Volkswagen | Beetle | 9C | - |
| Volkswagen | Bora | 1J | - |
| Volkswagen | Golf GTI | Mk4 | - |
| Volkswagen | Passat | B5 | - |
| Volkswagen | Polo | 9N | - |
Technical Specifications
| Spec | Value |
|---|---|
| Valve Type | Dual port, variable venting bias blow off valve |
| Replaces | Bosch 25 mm OEM diverter valve |
| Piston Design | Balanced piston (boost pressure cannot force valve open) |
| Venting Adjustment | Adjustable from 100% recirculation to 100% atmosphere venting, and anywhere in between |
| Technology | GFB TMS (Turbo Management System) |
| Boost Recovery | Up to 30% faster than a factory diverter valve on gearshift (per GFB testing) |
| Fitment Kit | Direct bolt-on kit, fits factory location, no modifications required |
No instructions available for this product.

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