The GFB Respons is an adjustable atmospheric/diverter valve kit for the Nissan Silvia and 300ZX. 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. Note: the twin-turbo 300ZX application requires two kits.
| Type | Adjustable atmospheric/diverter valve kit |
| Line | Respons TMS |
| Operation | Adjustable venting bias (atmospheric to recirculating) |
| Fitment | Nissan Silvia / 300ZX (twin-turbo 300ZX requires two kits) |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1987 | Chrysler | Conquest | Base |
| 1988 | Chrysler | Conquest | TSi |
| 1986-1987,1990-1991 | Mazda | 626 | GT |
| 1988-1989 | Mazda | 626 | Turbo |
| 1988 | Mazda | 626 | Turbo 4WS |
| 1988-1992 | Mazda | MX-6 | GT |
| 1989-1990 | Mazda | MX-6 | GT 4WS |
| 1984-1988 | Mitsubishi | Cordia | Turbo |
| 1983 | Mitsubishi | Starion | Base |
| 1984-1985 | Mitsubishi | Starion | ES |
| 1985,1988 | Mitsubishi | Starion | ESi |
| 1986-1989 | Mitsubishi | Starion | ESi-R |
| 1984-1987 | Mitsubishi | Starion | LE |
| 1983-1985 | Mitsubishi | Starion | LS |
| 1989-1996 | Nissan | 300ZX | Turbo |
| 1997 | Subaru | Impreza | Brighton |
| 1997-1998 | Subaru | Impreza | L |
| 1997-1998 | Subaru | Impreza | Outback |
| 1998 | Subaru | Impreza | RS |
| 1988-1992 | Toyota | Celica | All Trac |
| 1993 | Toyota | Celica | GTS All Trac |
