The GFB Respons is designed specifically with the aim of improving throttle response and reducing turbo lag. What’s TMS? GFB’s Turbo Management System is the term we apply to our diverter valves that have features designed specifically for the purpose of turbo lag reduction. Tests show that TMS features can return the engine to peak boost up to 30% faster than a factory diverter valve when shifting gears. On top of the TMS benefits, the Respons also packs GFB’s patented adjustable venting bias system found on the Stealth FX. This unique system allows the amount of air vented to either recirc or atmosphere to be infinitely varied to change the venting sound like a stereo volume dial! 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 sometimes associated with atmoventing valves on cars with MAFsensors.
Available in a range of universal hose-mount or direct bolt-on configurations for many popular models:
*Subaru WRX/STi MY97-98
*Subaru WRX MY01-07
*Subaru WRX/STI MY01-MY03 + 2015 STI
*STi MY02-on *Forester XT MY05-07
*Subaru WRX/STi MY99-00
*Forester GT/XT MY98-04
*Legacy B4
*Subaru WRX MY08-on
*Forester XT MY08-on
*Legacy GT MY03-09
*Nissan Skyline GTS-T/GT-T R32-34
*Mazda 3/6 MPS, CX-7
*Nissan GTR R35 (2 valves needed)
*Nissan Silvia/200SX S14-15
*VW/Audi – all 1.8t models
*Ford Falcon XR6 turbo BA-BF
*Mitsubishi EVO I-X

Hybrid GT2 spec intercooler kit - Toyota Hilux gen 7
Hybrid GT2 spec intercooler kit - WRX (GD V10)
Hybrid GT2 spec intercooler kit - WRX (GRF)
PACE MAKER exhaust system - Ford Falcon FG XR6 turbo
Hybrid X01-R intercooler kit - Toyota Starlet
Hybrid GT2 spec intercooler kit - Toyota Hiace
Hybrid GT2 Pro intercooler kit - Falcon FG XR6
Hybrid GT2 spec intercooler kit - GTIR
Kinugawa Japan 20G upgrade kit for EVO 1-3 TD05
DPR intercooler piping kit for Toyota Celica GT4
Toyota 4EFTE Starlet manifold and dump pipe set (suit TD04/TD05 turbo)
Hybrid GT2 spec intercooler kit - Toyota Hilux gen 8
Hybrid GT2 spec intercooler kit - EVO 7 - 9
Hybrid GT2 spec intercooler kit - Chaser JZX90-110
PACEMAKER exhaust system - Holden Commodore VE incl HSV LS2 and LS3
GFB EX38 38mm V-band wastegate
Turbosmart Kompact Plumb-Back BOV - Nissan
GFB D-FORCE diesel boost controller 3006
Hybrid GT2 spec intercooler kit - PX Mazda BT50 / Ford Ranger
Delta fin Intercooler - 550x230x65
Magnaflow exhaust system - Ford Mustang V8 5L
Wastegate spring kit for Tial 38mm wastegate MVS / MVR
RAGE exhaust system - Ford Falcon BA BF XR6 turbo
HDI Hybrid GT2 tube and fin intercooler
V-band clamp and flange 3" - suit Kinugawa turbos
Turbo oil feed kit BA / BF Falcon XR6 turbo
Turbo install kit EVO 4-9 TD05HR / TD06SL2R w/gaskets
Flange 2-bolt exhaust
BC Camshafts K20a stage 2 / 2+ / 3
Delta fin Intercooler - 550x140x65
Turbosmart TS-1 6262 V-band 0.82AR ext turbo (reverse rotation)
Turbosmart TS-1 6262 V-band 0.82AR ext turbo
Prosport USA fuel press. gauge - Premium Peak Warn
DPR Intercooler V-mount for FD RX7
DPR S13 R32 A31 Z32 rear camber arms
Turbosmart Kompact Plumb-Back BOV - Subaru Mazda
SSQV flange for EJ20 (type 2) Subaru - bolt on GC8 WRX 