# GFB 99-00 WRX/STI TMS Respons Blow Off Valve Kit

If cars like yours typically suffer issues such as backfiring and stalling when using a fixed-ratio atmosphere-venting BOV, the Respons can help. By adjusting the venting bias to suit the car you can achieve a blow-off sound without having to put up with the issues. Like all GFB valves, the Respons utilises GFB's proven TMS Technology to ensure rapid boost recovery on gearshift and optimum throttle response, as well as the ability to withstand boost pressures of 100psi+. Put simply, it can hold more boost than any turbo could produce.

-   Patented Venting Bias Adjustment
    
    This Part Fits:
    
    Year
    
    Make
    
    Model
    
    Submodel
    
    2004-2005
    
    Subaru
    
    Forester
    
    XT
    
    1999-2000
    
    Subaru
    
    Impreza
    
    L
    
    1999-2000
    
    Subaru
    
    Impreza
    
    Outback
    
    1999-2000
    
    Subaru
    
    Impreza
    
    RS
    
    1998-2000
    
    Subaru
    
    Legacy
    
    Brighton
    
    1998-2002
    
    Subaru
    
    Legacy
    
    GT
    
    1998,2000-2002
    
    Subaru
    
    Legacy
    
    GT Limited
    
    1998-2002
    
    Subaru
    
    Legacy
    
    L
    
    1999
    
    Subaru
    
    Legacy
    
    L 30th Anniversary
    
    1999
    
    Subaru
    
    Legacy
    
    Limited 30th Anniversary
    
    1998-1999
    
    Subaru
    
    Legacy
    
    Outback
    
    1999
    
    Subaru
    
    Legacy
    
    Outback Limited
    
    1998
    
    Subaru
    
    Legacy
    
    Postal
    
    1999
    
    Subaru
    
    Legacy
    
    SUS 30th Anniversary

## Details

- **Price:** 465.5 CAD
- **Vendor:** Go Fast Bits
- **Type:** Blow Off Valves

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 465.50 CAD | In stock |

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/gfb-99-00-wrx-sti-tms-respons-blow-off-valve-kit)
> Updated: 2026-06-28