Go Fast Bits Respons TMS Blow Off Valve | 2008-2014 Subaru WRX, 2003-2009 Subaru Legacy GT, and 2009-2013 Subaru Forester XT (T9001)

Go Fast Bits
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$298.80 $332.00Instant Savings of 10% ($33.20)

Earn  $5.98 In MAP Rewards!

2008-2014 Subaru WRX, 2003-2009 Subaru Legacy GT, and 2009-2013 Subaru Forester XT Respons TMS Blow Off Valve by Go Fast Bits

On the surface, it may look like just another dual-port blow-off valve, but the Respons is 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.

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.

When we say “bolt-on”, that’s EXACTLY what we mean. Everything you need is included, it fits directly in the factory location (not on a separate adaptor), and no modifications to the car are required.


  • Adjust the volume of your blow-off sound
  • Get the blow off sound without the hassles - even on sensitive MAF-based systems
  • Hold unlimited boost pressure


  • Up to 30% faster boost recovery on gearshift


  • 2008-2014 Subaru WRX
  • 2003-2009 Subaru Legacy GT
  • 2009-2013 Subaru Forester XT

What's In The Box?

  • 1 - BOV
  • 1 - Installation Hardware Kit



  • GFB's Limited Manufacturer's Warranty

Customer Reviews

Based on 3 reviews
Caleb Laws
Good quality

If you are running a car with a MAF this is the BOV for you. Its actually really nice you can adjust it how you want. Also the machining quality is really nice.

Ariez Lightwalker
Love it

Definitely worth the purchase. Great product and MAP shipping arrived a day early. Thank you!

Morgan Bartell
Awesome service as usual

Great product, fully tunable, best price on the web!