SET YOUR CAR
Buy Now, Pay Later!
FREE SHIPPING
On orders over $200
TALK TO A PARTS EXPERT
RALLYSPORT GUARANTEE
100% Money Back on Select Parts
Product images
Product Media
Go Fast Bits Blow Off Valve Whistling Trumpet Attachment High Boost (Part Number: )
Go Fast Bits Blow Off Valve Whistling Trumpet Attachment High Boost (Part Number: )
Go Fast Bits Blow Off Valve Whistling Trumpet Attachment High Boost (Part Number: )
Go Fast Bits Blow Off Valve Whistling Trumpet Attachment High Boost (Part Number: )
Go Fast Bits Blow Off Valve Whistling Trumpet Attachment High Boost
Universal
Read 7 Reviews | 6 Q&As
Part # 5701
$35.10
msrp: $39.00

In stock! Ships same day
Universal part

Features & Product Details

RallySport Direct carries the Go Fast Bits High Boost Blow Off Valve Whistling Trumpet Attachment. Note that this is for the attachment only, and does not include the blow-off valve. 

Here are the details:

  • Works with the Stealth FX, Decepter Pro, and TMS Respons blow-off valves
  • Produces and aggressive whistle
  • Works best when used over 12 psi of boost
  • Specifications

    Brand: Go Fast Bits
    QTY: 1
    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.
    RallySport Guarantee

    PEOPLE WHO VIEWED THIS ITEM ALSO VIEWED

    REVIEWS & CUSTOMER MEDIA

    7 Reviews
    4.4 out of 5 Stars
    5 Stars
    (5)
    4 Stars
    (1)
    3 Stars
    (0)
    2 Stars
    (1)
    1 Stars
    (0)
    Customer Photos and Videos
    No user media. You can upload a photo or video of your install by posting a review.
    Didn't work with 50/50 setup 4 years ago
    15_STI
    I purchased one of these direct from GFB here in Australia and put it on my 2015 STI. Unfortunately, it would never whistle with my preferred 50/50 vent setting on the Respons BOV. I've since purchased the low boost version from RallySportDirect which is working perfectly with 50/50 vent. Regardless, it's a decent product, just get the low boost version if you aren't going 100% vent to atmosphere.
      
    Was this review helpful?
    pssssssshhhhhhh Whooooo! 4 years ago
    Scoobie Blue
    Love It! This little thing makes your boring, bus air brake sounding, GFB BOV come alive. Giving it a very distinct, out of the ordinary sound. pssssssshhhh whooooo! Notes: Tested with GFB Respons BOV T9003 Need to set BOV to 100% Atmospheric in order for it to whistle (as stated in a previous review). Originally tried 50/50 and even with full boost approx. 20psi, no whistle... :( After setting to 100%, any boost pressure above approx. 12psi makes your car go wooo wooooooooo LOL.
      
    Was this review helpful?
    Trumpet (high boost) 5 years ago
    jgarza725034016
    Installed trumpet for high boost and all I hear is the whoosh sound no whistle like it said in the description, I have the gfb dual action blowoff and the corksport CAI
      
    Was this review helpful?
    1 of 1 people found the following review helpful
    A must have  5 years ago
    bladesti
    The original trumpet didn't fit with those lines on the intercooler, glad I bought this at the same time as the bov! Sounds amazing! Thanks RSD!
      
    Was this review helpful?
    GFB BOV Trumpet 6 years ago
    AFRanger
    I like this, I ordered the wrong one though... apparently I needed the low boost one, wrx TD04 running the GFB BOV and high boost trumpet. So I can't return my high boost one because I put it on, so now I am probably going to get the low boost one and see if I can hear it better with out having to shift a 5K to hear it whistle.... which by the by when it does whistle it sounds awesome. A lot of people are saying they can't get it to whistle, well you have to go 100% VTA to get it to whistle. Just FYI.
      
    Was this review helpful?

    QUESTIONS & ANSWERS

    • Q: GFB TMS hybrid  CG_sti4 years ago

      if I am running any where from 15-20 PSI on 50/50 would I still here the whistle?
      • 0 of 0 people found the following answer helpful

        A:  Yes, you would definitely still hear it. Any pressure above 12PSI will work with this attachment.

        guest56ad69792a8d256e198b66b5 @
          
        Was this answer helpful?
    • Q: Trumpet high boost.   chrisorchard21266895 years ago

      What does the trumpet sound like at low boost, and I am stage 2 around 16psi will I want the high or low boost trumpet.
      • 0 of 0 people found the following answer helpful

        A:  At low boost this trumpet will not have much of an effect on the sound and for 16psi this high boost trumpet is recommended.

        Zach G. @ RallySport Direct 5 years ago  
          
        Was this answer helpful?
      • 0 of 0 people found the following answer helpful

        A:  It makes a normal whoosh sound at low boost, which then changes to the whistle sound once a certain threshold has been crossed. On a T9003 Respons valve, the 5701 will whistle with as little as 12psi, but on T9001 valves you need more like 16psi. This is not because the valves are different, but because of the way the air enters them from the particular intercoolers these valves bolt onto - the T9003 gets a straight shot from the intercooler plenum, where the T9001 goes through a right angle before it goes into the valve.

        GFB @ Go Fast Bits 5 years ago  
          
        Was this answer helpful?
    • Q: Perrin Recirculating Blow Off   Alonso5 years ago

      I´ve the perrin Blow Off without the recirculating part, can I install this trumpet in my blow off?
      • 0 of 0 people found the following answer helpful

        A:  This trumpet will not work with the Perrin BOV and is only compatible with the Go Fast Bits valves.

        Zach G. @ RallySport Direct 5 years ago  
          
        Was this answer helpful?
    • Q: 09 stock sit  jakerWRX5 years ago

      witch one? low or high boost
      • 0 of 0 people found the following answer helpful

        A:  The low boost trumpet at stock boost levels would be more likely to whistle over the high boost unit.

        Nick S. @ RallySport Direct 5 years ago  
          
        Was this answer helpful?
    • Q: Low or High?  Kappzilla5 years ago

      Running OTS Stage 1 COBB map. 13 WRX I peak at 18psi. Normal driving im around 6-11psi. So I think I need the low boost one. if I get it will it sound weird when I am hitting 18psi? Thanks
      • 1 of 1 people found the following answer helpful

        A:  You will want to get the high boost unit. if you get the low boost unit it will not change the sound

        Kirill C. @ RallySport Direct 5 years ago  
          
        Was this answer helpful?
      • 1 of 1 people found the following answer helpful

        A:  I agree the high boost unit will sound better at 18psi, but it depends when you want to hear it whistle... There is a distinct change-over point when the sound swaps from a whoosh to a whistle. If you want to hear a whistle during your daily driving at 6-11psi, get the low boost unit. If you want it only to whistle when you hit high boost, get the high boost unit.

        GFB @ Go Fast Bits 5 years ago  
          
        Was this answer helpful?

    This Part Fits

    Universal Product
    This item is non application specific.
    Please verify compatibility before purchase. May require some modification for proper installation.