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Go Fast Bits Mach 2 TMS Recirculating Diverter Valve (Part Number: )
Go Fast Bits Mach 2 TMS Recirculating Diverter Valve (Part Number: )
Go Fast Bits Mach 2 TMS Recirculating Diverter Valve (Part Number: )
Go Fast Bits Mach 2 TMS Recirculating Diverter Valve (Part Number: )
Go Fast Bits Mach 2 TMS Recirculating Diverter Valve (Part Number: )
Go Fast Bits Mach 2 TMS Recirculating Diverter Valve (Part Number: )
Go Fast Bits Mach 2 TMS Recirculating Diverter Valve (Part Number: )
Go Fast Bits Mach 2 TMS Recirculating Diverter Valve (Part Number: )
Go Fast Bits Mach 2 TMS Recirculating Diverter Valve (Part Number: )
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Go Fast Bits Mach 2 TMS Recirculating Diverter Valve (Part Number: )
Go Fast Bits Mach 2 TMS Recirculating Diverter Valve (Part Number: )
Go Fast Bits Mach 2 TMS Recirculating Diverter Valve
Subaru WRX 2002-2007 / STI 2004-2014 / Forester XT 2006-2008
Read 4 Reviews | 9 Q&As
Part # T9103
$184.10
msrp: $204.55

In stock! Ships same day

Features & Product Details

The Mach 2 is configured as a 100% recirculating valve (i.e. bypass, plumb back) and add on kits are also available to convert to 100% atmosphere venting. Use the recirc model for direct factory replacement when you want the performance WITHOUT the noise! Add the conversion kit when you want some noise with your performance!

Factory bypass valves have two main shortcomings – one is that they are typically designed to start opening above a certain pressure to protect the engine, and the other is they are not optimised for throttle response. Oh, and you can’t vent them to atmosphere without stalling your engine.

The Mach 2 solves all of these issues. It can effectively hold unlimited boost (unlimited in that no turbo could ever produce enough pressure to damage it), and the TMS technology ensures maximum throttle response. Oh, and you CAN vent with the atmo conversion to atmosphere without stalling your engine.

Specifications

Brand: Go Fast Bits
Adjustable: Yes
Color: Black
Design: Piston
Includes Gasket(s): Yes
OEM Replacement: Yes
QTY: 1
Valve Type: Recirculating
Mfgr. Warranty: 1 Year
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days


Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
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REVIEWS & CUSTOMER MEDIA

4 Reviews
5 out of 5 Stars
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Customer Photos and Videos
Go Fast Bits Mach 2 TMS Recirculating Diverter Valve ( Part Number: T9103)
Go Fast Bits Mach 2 TMS Recirculating Diverter Valve ( Part Number: T9103)
By -pass valve 1 month ago
Tidwelroth
Works great! really quick throttle response. Never tried it full atmosphere kinda like how quickly it's back to biulding boost! Recommend.
  
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Sounds amazing 1 year ago
Conman1667
An awesome diverter valve that feels very sturdy and heavy, amazing sound under boost, I love the flutter that it makes and it's not too loud like an actual blow off but loud enough to hear in the car and fall in love with driving, install took 5 minutes; no directions needed. Gets louder and better depending on how much psi is built up in the turbo. The video is @ 7psi
  
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Solid Piece  3 years ago
StupidIdiot
Great quality valve. I have a Cobb intake with the box so my turbo is loud and it exhales loud as well. This didn't change the sound when i shift high, but when i shift at very low RPM it changed the sound a little bit which I didn't expect this thing to do. not a bad thing, I like it. The only issue i had was when i took the old one off and I had to take the stock elbow off, the 2 screws were on there so tight and the screws were so soft I stripped it in one twist. So I had to drill the old screws out and go to the hard ware store to replace them with stainless steel screws. So I also got to upgrade some screws while i was at it. amazing!
  
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Perfect!!! Can I give 6 stars??? 3 years ago
justme142176680
My wife's 2011 STI is what the kiddos call stage 2+. There's much more to it, but we've basically just maximized the stock setup. The car has had a stutter I have been unable to tune out with the AP tuning software. I got it to move in the rpm range, but it was still there. Long story short we narrowed it down to the stock by-pass valve. I bought this as a mothers day gift. I liked that it wasn't intended to be a noise maker for teen tuners. Figured for the price why not try. We installed it in about 15min. And spent an hour making 2500-3500rpm runs to fine tune it. The end result is absolutely no stutter, and her car shifts like a dream! Drivability is improved and it makes the power band more usable resulting in a better performing STI. I will buy another one when I buy my WRX beater!
  
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QUESTIONS & ANSWERS

  • Q: Tune for stock STi?  flame3 months ago

    Hi, do i really need to tune this for my stock 2011 STi? and i do mean stock..
  • Q: Fmic  joeysanchez33391955 months ago

    Could this be used for a fmic or is it only for a tmic
    • 0 of 0 people found the following answer helpful

      A:  It would be possible to use this with a FMIC if it had the same flange, but depending on the flange's location on the piping, you also may have to modify the recirculation hose.

      Marcus E. @ RallySport Direct 4 months ago  
        
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  • Q: Leaks  Sub_GOT5 months ago

    I have a 2010 subaru sti which I want to install a blow off (this has the stage1 + CPF 91 v334). I have heard that this product has a leakage defect. How true is it? Also, another blow off recommends me with the configuration that I have but that it is a blow off Recirculating. Thank you.
    • 0 of 0 people found the following answer helpful

      A:  As far as the leaking goes it's something that people report if they don't do the smoke test the specific way that Go Fast Bits requires it to be done. For the second part of the question; For a Subaru you want to keep it recirculating since that is what the car requires as to not run rich or get pops between shifts. ( If you aren't tuned for speed density)

      Megan L. @ RallySport Direct 4 months ago  
        
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  • Q: Well I need a tune ?  Ricardo925 months ago

    I just got the mach 2 and I'm planning on installing it this weekend. But I want to know since it's a full recirculating am i going to need a tune. I already my wrx on stage 2

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