$369.99 CAD

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Adjustable  Yes
Colour  Black
Design  Piston
Gasket Included  No
Manufacturer Warranty  1 Year
OEM Replacement  Yes
Quantity  1
Valve Type  Hybrid


As the name suggests, the GFB Respons is designed specifically with the aim of improving throttle response and reducing turbo lag.
What is TMS?
GFB’s Turbo Management System is the term they apply to their 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 commonly associated with atmo-venting valves on cars with MAF sensors.
- Advanced TMS benefits
- Spring pre-load adjustment for max. response
- Available as universal or direct-fit kit
- Venting configurations:
        - Full progressive bias adjustment from recirc (silent) to atmosphere (loud)
        - Bias adjustment done manually via cap ring
        - Can be locked off in full recirc mode for legality purposes
2015-2020 Subaru WRX
GFB Spring Pre-load Adjustment

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