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Exterior Components› Body Panels and Components

Go Fast Bits

GFB Whistling Trumpet (only for Stealth FX and WRX Hybrid)

$44.90 $40.41 Save $4.49

SKU: G004 5701

In Stock
In Stock
Ships by Aug 6
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

Part #: 5701

The 5701 can be used in place of the standard trumpet on GFB valves (Part numbers T9003 & T9503), and will make a whistling sound. However, it is necessary to run the valve so that all (or most) of the air vents through the trumpet Respons valves will typically not generate the velocity required to whistle when set to 50/50 venting.

The ability to change the sound of a blow-off valve is increasingly becoming an important issue with buyers, who want to sound different from everyone else.

MIA's Description

The Go Fast Bits 5701 Whistling Trumpet is an accessory designed to alter the sound of your blow-off valve. This trumpet allows buyers to achieve a different sound from their vehicle's exhaust system. It was released in 2004 to emit a piercing screech during aggressive driving.

Fitment

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandGo Fast Bits
Part NumberG004 5701

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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