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

Radiator Cap - Violence - small head 1.3bar
Fidanza adjustable cam gear - Toyota 3s-gte
Greddy E-manage Ultimate
Hybrid GT2 spec intercooler kit - WRX (GC8)
Malpassi Single Carburettor Fuel Pressure Reg (FI)
Inline filter -6AN
Bosch 044 700HP external fuel pump w/ bracket
Kinugawa Japan 20G upgrade kit for EVO 1-3 TD05
Turbo oil feed kit Subaru TD05H TD06 AVCS KIT
Link G4 storm Engine Management ECU (plug in)
Kinugawa -4AN female to -6AN male adapter fitting
Hybrid GT2-S intercooler kit - Falcon FG XR6
Hybrid Stage 3 intercooler and intake kit- Falcon FG XR6
Dash mount triple gauge holder - 60mm
DPR Fuel rail adaptor - Honda
King Coil Springs - Low / Super low
Eye brow - Mitsubishi Lancer / Evo 99-00
SD Rod End (chromolly, imperial) R/L
Greddy E-Manage Blue
Hybrid X01-R intercooler kit - Toyota Starlet
D2 Racing coilovers - super street series
Hybrid GT2 spec intercooler kit - Toyota Hiace
SSQV flange for EJ20 (type 2) Subaru - bolt on GC8 WRX
Turbosmart Vee-Port Pro BOV Subaru fitment 