08 09 10 11 12 13 14 Wrx Sti Gfb Fully Adjustable Bov (blow Off Valve) on 2040-parts.com

A brief description of the go fast bits blow off valve is below the reason why I am selling this part is because I traded my 2008 WRX STI for a 2013 WRX this part does not fit that car for more information you're welcome to call or text me at 517-410-8307.

This part will fit a 2008 through a 2014 Subaru Impreza WRX STI

Respons TMS

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.

Respons TMS can increase your boost by 30% during throttle modulation

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 (check engine light), running rich, stalling, using more fuel or causing any other problems commonly associated with atmo-venting valves on cars with MAF sensors.(*Chart shows comparative manifold boost pressure rise during 1st to 2nd gear shift as tested on a CA18DET with a T28 turbo. GFB TMS improvement is seen as a 30% faster return to peak boost, during which time up to40% more boost is available)

How GFB’s patented venting bias adjustment works

Twisting the adjusting ring opens up the atmo port, whilst the recirc port is simultaneously closed.This results in possible venting ratios ranging from 100% recirc, right through to 100% atmosphere and anywhere in between.