On the surface it may look like just another dual-port blow-off valve,but the Respons is actually much more than that. Featuring GFB’s patented venting bias adjustment system, the Respons allows you to precisely control how much air vents from each of the two outlets.
Why is this so important? Two key reasons:
Hold on, it gets better. The Respons isn’t just a noise-maker. It also;
The GFB Respons blow off valve is designed specifically with the aim of improving throttle response and reducing turbo lag.
On top of the TMS benefits, the Respons also packs GFB’s patented adjustable venting bias system found on the Stealth FX. So if you want noise with your performance, the Respons can deliver! By fine-tuning the venting ratio, you CAN achieve a blow-off sound WITHOUT throwing a CEL, running rich, stalling, using more fuel or causing any other problems commonly associated with atmoventing valves on cars with MAF sensors.
Tests show that TMS features can return the engine to peak boost up to 30% faster than a factory diverter valve when shifting gears.
Available in a range of universal hose-mount or direct bolt-on configurations for many popular models:
HYUNDAI I30 N 2.0T-GDI (2017-on)
KIA Stinger 2.0T-GDI 2017-on
HYUNDAI I30 N 2.0T-GDI (2017-on)
HYUNDAI I30 N sedan/Elantra N 2.0T-GDI (2021-on)
HYUNDAI Kona N 2.0 T-GDI (2021-on)
The GFB Respons blow off valve is designed specifically with the aim of improving throttle response and reducing turbo lag.
GFB T9000 BOV suits the following vehicles:
Subaru Impreza WRX/STi (GC8-GF8) MY99-00 EJ20T
Subaru SF Forester GT MY98-00 EJ20T & EJ25T
Subaru SG Forester XT MY03-04 EJ25T
Subaru BE (B4) Legacy MY98-02 EJ20TT
The GFB Respons blow off valve is designed specifically with the aim of improving throttle response and reducing turbo lag.
GFB T9001 BOV suits the following vehicles:
Subaru Forester (SH) XT MY09-on EJ25T
Subaru Impreza WRX (GH) MY08-on EJ25T
Subaru B4 Legacy (BL-BP) MY03-09 EJ20T (incl Subaru Blitzen B4)
The GFB Respons blow off valve is designed specifically with the aim of improving throttle response and reducing turbo lag.
GFB T9002 Blow off Valve suits the following vehicles:
Nissan R32 Skyline (GTS-T & GTR) RB20DET /RB26DETT
Nissan R33/R34 Skyline (GTS-T & GTR) RB25DET/RB26DETT
Mazda 3 MPS (MZR L3-VDT)
Mazda 6 MPS (MZR L3-VDT)
CX7 (MZR L3-VDT)
Mitsubishi VR4 Galant E38A/E39A (87-92) 4G63
The GFB Respons blow off valve is designed specifically with the aim of improving throttle response and reducing turbo lag.
GFB T9003 BOV suits the following vehicles:
Subaru WRX Impreza/STi (GDA-GGA & GDB-GGB) MY01-03/MY03-07 EJ20T/EJ25T
Subaru WRX/STi (GR) MY08-on EJ25T
Subaru Forester XT (SG) MY05-08 EJ25T
The GFB Respons blow off valve is designed specifically with the aim of improving throttle response and reducing turbo lag.
GFB T9004 Blow off Vlave suits the following vehicles:
Nissan Silvia/200sx S14 & S15 (94-06) SR20DET
The GFB Respons blow off valve is designed specifically with the aim of improving throttle response and reducing turbo lag.
GFB T9020 BOV Suits the following vehicles:
Subaru WRX/STi GC8 MY94-96 EJ20T
Mazda Miata/MX5 BP-4W (SE 04-05 model)
The GFB Respons blow off valve is designed specifically with the aim of improving throttle response and reducing turbo lag.
GFB T9025 BOV suits the following vehicles:
Audi A3/A4 & Audi TT 1.8 Turbo - VW Golf GTi/Bora/Passatt/Jetta/New Beatle/Polo Gti
Ford XR6 Turbo ( BA/BF) 4.0L Turbo (02-07)
Ford Territory (SY) 4.0L Turbo (06-07)
Mazda MX5 BP-Z3 (SP 02 model)
Skoda Octavia 1.8T Mk1 (1U) 98-06
Seat Ibiza Cupra Mk2-Mk3 1.8T 99-08 /
Seat Leon Mk1 1.8T 99-05
FORD AUSTRALIA XR6 FG 4.0L turbo 08-on
The GFB Respons blow off valve is designed specifically with the aim of improving throttle response and reducing turbo lag.
GFB T9033 BOV suits the following vehicles:
Mitsubishi Lancer EVO 1/2/3 4G63
Mitsubishi EVO 4/5/6 4G63
Mitsubishi Lancer EVO 7/8/9/10 4B11T
Mitsubishi VR4 Legnum E84A/EC5A/EC5W (6A12TT/6A13TT)
Mitsubishi Ralliart Colt 4G15 (06-on)
The GFB Respons blow off valve is designed specifically with the aim of improving throttle response and reducing turbo lag.
GFB T9035 Blow off Valve suits the following vehicles:
Nissan PS13 Silvia S13 180sx CA18DET/SR20DET (88-97)
Nissan N14 GTiR Pulsar SR20DET ( needs the softer spring # 6116 installed)
Nissan Z32 300ZX VG30DETT ( 2x T9035 required - Please enquiry about price)
Subaru WRX/STi (GC8-GF8) MY97-98 EJ20T
Toyota Celica GT4 3S-GTE (ST165-ST185)
Toyota Celica GT4 3S-GTE (ST205)
The GFB Respons blow off valve is designed specifically with the aim of improving throttle response and reducing turbo lag.
GFB T9005 Blow off Valve suits the following vehicles:
Nissan R35 GTR Skyline Blow Off Valve/BOV ( 2 Valve set)
GFB T9013 BOV suits the following vehicles:
KIA Stinger 3.3T-GDI 06/17-on