GFB Respons Dual Port Variable BOV
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GFB Respons Dual Port Variable BOV - Subaru WRX (GDB)/STI (GDB/GRB/VAB)/Forester XT (SG)
GFB pioneered the dual port blow off valve back in 1999 and the Respons remains the benchmark. It lets you dial in the exact blend of recirculation and atmospheric venting, so you get the sound you want without the stalling or over-fuelling issues that plague cheaper valves. Built for the Subaru WRX and STI, it delivers genuine boost retention and faster recovery between gears.
This listing covers the WRX (GDB), STI (GDB), STI (GRB), STI (VAB) and Forester XT (SG). SKU T9003.
Note: Forester XT (SG) fitment requires the triangle flange BOV. Diamond flange models will need the T9500 instead — check your factory valve before ordering.
Key Features
- Adjustable venting bias from full recirc to full atmosphere
- Up to 30% faster boost recovery on gearshift
- Unlimited boost holding capability
- Safe on sensitive MAF based fuelling systems
- Direct bolt-on kit, no modification required
Vehicle compatibility, OEM part numbers, and fitment notes are provided in the tabs above. Please confirm your BOV flange type and model year 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 |
|---|---|---|---|
| Subaru | Forester XT | SG | - |
| Subaru | STI | GDB | - |
| Subaru | STI | GRB | - |
| Subaru | STI | VAB | - |
| Subaru | WRX | GDB | - |
Technical Specifications
| Spec | Value |
|---|---|
| Part Number | T9003 |
| Valve Type | Dual Port Variable Blow Off Valve (BOV) |
| Venting Bias Adjustment Range | 0% to 100% atmosphere venting (fully variable recirc-to-atmo ratio) |
| Boost Recovery Improvement | Up to 30% faster than a factory diverter valve on gearshift |
| Piston Design | Balanced piston (boost pressure applied on both sides to prevent forced opening at high boost) |
| Compatible Flange Type | Triangle flange only (diamond flange requires GFB T9500) |
| Kit Type | Direct bolt-on (fits factory location, no adaptor or modification required) |
No instructions available for this product.
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