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

Marsoni M251S
Sale price$40.41
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Get it in 3 business days with 1 day shipping. Friday, May 29
GFB Whistling Trumpet (only for Stealth FX and WRX Hybrid)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.
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  • Standard: 3-7 business days
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  • Express: 1-2 business days

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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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  • Please click here for more details>>> Return & Exchange Policy
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Maritza Martinez
Phoenix, US
★★★★★ 5
Cumplió las espectativas
Color: Navy Blue, Size: 32W x 29L
Exacto igual que la foto y de buena calidad
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Reviewed in the United States on May 31, 2026
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Jose Gauto
Lexington, US
★★★★★ 5
Price and desing
Desig macth on other price brand
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Reviewed in the United States on May 29, 2026
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Sou Saelee
Pawtucket, US
★★★★★ 5
Comfort
Color: Classic Black, Size: 36W x 30L
Comfortable!!!!
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Reviewed in the United States on May 9, 2026
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Jorge lozano
San Leandro, US
★★★★★ 5
Buena calidad
Color: Khaki, Size: 40W x 30L
Bastante más cómodo de lo que esperaba
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Reviewed in the United States on April 29, 2026
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fun
Natrona Heights, US
★★★★★ 5
Slacks
Color: Classic Black, Size: 42W x 32L
Great look and fit
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Reviewed in the United States on May 1, 2026

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