The GFB Respons is an adjustable atmospheric/diverter valve kit for the 2004-2005 Mazdaspeed Miata and 1993-1998 Toyota Supra (Supra fitment requires modification of the factory hoses). A patented venting-bias adjustment lets you dial in blow-off sound without the backfiring or stalling that fixed-ratio atmospheric valves can cause. It uses GFB's TMS technology for rapid boost recovery and sharp throttle response.
| Type | Adjustable atmospheric/diverter valve kit |
| Line | Respons TMS |
| Operation | Adjustable venting bias (atmospheric to recirculating) |
| Fitment | Mazdaspeed Miata / Toyota Supra (Supra requires factory hose modification) |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2005 | Mazda | Miata | Mazdaspeed |
| 1994-1995 | Subaru | Impreza | Base |
| 1996 | Subaru | Impreza | Brighton |
| 1994-1996 | Subaru | Impreza | L |
| 1994 | Subaru | Impreza | LS |
| 1995-1996 | Subaru | Impreza | LX |
| 1995-1996 | Subaru | Impreza | Outback |
| 1993-1998 | Toyota | Supra | Base |
| 1993-1998 | Toyota | Supra | Twin Turbo |
