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GFB - Go Fast Bits GFB 50/50 Blow-off Valve
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86% of reviewers $177.50 7.4
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Description: Blow off valve to suit MY02 onwards, Impreza WRX and STi. (GD and GG models) Kit includes all parts to bolt directly to OE intercooler as well as custom bolt up flange to fit return hose. Unique design allows both venting to atmosphere to give that unique "whoosh" noise as well as part venting back to inlet to stop over fueling and poor idle.


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Aithien
VIP Member

Registered: December 2002
Location: California
Posts: 149
Review Date: Fri July 9, 2004 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 7 

 
Pros: 100% Vent, or 50/50 vent/recirculating, Simple to install
Cons: Not very loud, Requires some parts from the stock bypass valve

The GFB 50/50 Blow-off Valve is great for those concerned about what 100% venting can do to the car. Personally, I don\'t see much of a difference whether you vent or recirculate, however the difference is much more obvious to some people.

This blow-off valve requires the recirculating outlet of the stock bypass valve. You will need to get some allen wrenches to screw it off and replace it on the GFB.

However, those looking for a mean and loud BoV might not be interested in the GFB piece, mostly because it tends to be on the quiet side (though audible in the cabin). For those who want the best of both worlds though (recirculating and a nice little psshhh for fun), this is the one of the better products for it\'s price.
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qwk_wrx

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Registered: July 2003
Location: Rohnert Park
Posts: 2371
Review Date: Sun July 18, 2004 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 9 

 
Pros: nice sound, not too loud
Cons: none

i believe this blow off valve to be one of the best because if does not mess up idle and is not overly loud...

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Hwy 1 fun.......
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t-wrexxx
Registered User

Registered: May 2003
Location: www.tristatetuners.com
Posts: 433
Review Date: Tue July 27, 2004 Would you recommend the product? Yes | Price you paid?: $249.99 | Rating: 8 

 
Pros: sound, 50/50 feature
Cons: needs constant greasing

The reason I bought this one was the 50/50 recirculation feature. The only problem that I have had is that the piston needs greasing about once a month or it sticks and won\'t open. Overall, I\'m happy with it.
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whiting
Registered User

Registered: October 2004
Posts: 5
Review Date: Wed December 8, 2004 Would you recommend the product? No | Price you paid?: $130.00 | Rating: 3 

 
Pros: had a good pssh sound
Cons: caused compressor surge, aweful BOV, alway got stuck

I got it fro anothever got a chance to use iter suby owner who never got a chance to use it, I couldn\'t get it set right and at any low to mid range boost it would surge. I wouldn\'t buy it unless you want turbo problems, but if you want the chechecheche of your turbo backspooling go ahead
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bpang1

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Registered: August 2004
Location: Cincinnati, OH
Posts: 7150
Review Date: Tue January 4, 2005 Would you recommend the product? Yes | Price you paid?: $180.00 | Rating: 9 

 
Pros: It\'s 50/50...cool color
Cons: No added performance for stock WRXs

Same rating I gave the HKS one but this one seems to be more harmonious with the law and the ECU
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.:: 808 STi ::.

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Registered: May 2003
Location: soul society...
Posts: 4924
Review Date: Wed July 6, 2005 Would you recommend the product? Yes | Price you paid?: $150.00 | Rating: 7 

 
Pros: nice looking BOV, interesting sound...
Cons: not too loud...

great bov i like the adjustability...but...i kinda wanted to stay with the stock recirc valve...

other than that...great BOV

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illogical

Registered User

Registered: May 2004
Location: Fremont, CA
Posts: 1187
Review Date: Wed February 14, 2007 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 9 

 
Pros: Adjustable, different configurations
Cons: Eats lube

I really like this BOV. Aside from it liking to be lubed often, it's adjustable and reliable. I've run it without problems in 100% re-circ, 50/50, and 100% atmo modes. Like all other BOV's there is no performance gain unless you're packin' a bigger turbo. Running 50/50 is probably best; less backfires... saves your cats (*wink*)
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