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GFB BOV Trumpet Extremely Loud BOV Horn

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  • Regular price $55.00
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This will turn your GFB BOV or GFB Bypass Valve into a VERY loud BOV!

 THIS IS THE LOUDEST BOV YOU CAN FIND WITH THIS HORN. THIS HORN IS BEYOND EXTREMELY LOUD.

Whistling Trumpet
You asked, we delivered. Many times we have been asked for a replacement trumpet that gives a different sound, and here it is.

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.

In 2004, GFB released the Whistling Trumpet (part # 5701), which emitted a piercing screech when driving aggressively. Unfortunately for a number of GFB owners, the 5701 trumpet only worked with some valve types.

For the owners of all other types of GFB valves, we have now released this Horn  – a modified version of the Whistling Trumpet that is designed to work on low boost applications where the 5701 doesn’t cut it.

This can be used in place of the standard trumpet on all GFB valves, and will make the whistling sound more readily than the 5701 (high boost and RPM is required to get the whistle from a 5701), and at a slightly higher pitch. Like the 5701 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.


Customer Reviews

Based on 18 reviews
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D
Dominic
Just alright, doesn't whistle, tight fit, somewhat loud

Not sure what went wrong here. I installed this on my Elantra N with the GFB Deceptor Pro II adjustable BOV. This trumpet is so long that it's a struggle to actually install, since it will be pressed against the fan shroud. Also, there is no whistling sound at all. If possible I'd attach a video to show you guys how it sounds. It's definitely loud, but it just makes a "Pshh" noise, not the loud high pitched whistle that you see in YouTube videos of this product. Not sure if mine is just defective or what, but that's the situation for me. (Yes, I tried it with the BOV set to 100% vent).

twist the charge pipe, it will clear without issue.

You have to set it to BOV, I am more than sure from your describtion its set to recirc.

A
A.c.w.

Idk for $40 its worth it i guess its louder

E
Edwin Custodio

GFB BOV Trumpet Extremely Loud BOV Horn

D
Darren Ashker
LOUD!!!!!

Have to go full VTA on the GFB Hybrid BOV but WOW is it loud!!!!!

M
Matthew

I don’t notice much of a difference if any from the product included with the BOV. Would not buy again.