On the surface, the GFB Respons BOV look like just another dual-port blow-off valve, but the GFB Respons is actually much more than that. Featuring GFB’s patented venting bias adjustment system, the GFB Respons allows you to precisely control how much air vents from each of the two outlets.
Why is this so important? Two key reasons:
- Adjust how loud the blow-off sound is. Recirculate all of the air for silent factory operation, vent it all to atmosphere for maximum noise, or set it ANYWHERE in between to suit your preference.
- Get a blow-off sound WITHOUT causing stalling, backfiring, or any other BOV-related issues, even on a car with a sensitive airflow meter (MAF).
Hold on, it gets better. The GFB Respons isn’t just a noise-maker. It also;
- Offers better throttle response
- Faster boost recovery on gearshift
- Unlimited boost-holding!
GFB T9003 BOV Suits the following vehicles:
Subaru Impreza STi GDB-GGB EJ20T 02-07
Subaru Impreza STi GDB-GGB EJ25T 02-07
Subaru Impreza STi GR EJ25T 08-11
Subaru Impreza STi EJ25T 14-on
Subaru Impreza WRX GDA-GGA EJ20T 00-07
Subaru Impreza WRX GDA-GGA EJ25T 06-07
Subaru Forester XT SG Series 2 EJ25T 05-08
