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GFB Whistling Trumpet (suits all valves)

Marsoni M251S
Sale price$40.41
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GFB Whistling Trumpet (suits all valves)The 5702 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.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
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4.7 ★★★★★
Based on 43 reviews
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Stephen
Fort Morgan, US
★★★★★ 5
Great value and fit!!
Size: Small, Color: Stone Grey 1 Pair
Excellent socks for the price!! Fast shipping with Prime!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 17, 2026
B
Verified Purchase
Brian
Port Orchard, US
★★★★★ 5
Comfortable and breathable
Size: Medium, Color: Coyote Brown 4 Pairs
Super comfortable socks that breathe well in my Danner steel toes. Not a lot of shrinkage in the wash so they fit right over and over. Don’t slide down your legs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 14, 2025
D
Verified Purchase
Douglas Cooper
Charlottesville, US
★★★★★ 5
Good
Size: Large, Color: Stone Grey 4 Pairs
Good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
N
Verified Purchase
NeOutdoors
San Leandro, US
★★★★★ 3
Not enough underfoot padding
Size: Medium, Color: Coyote Brown 4 Pairs
Socks are well made but would be better if they had thicker padding under the toe and heal.
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Reviewed in the United States on August 2, 2025
E
Verified Purchase
Ethan
Louisville, US
★★★★★ 5
Very good quality for the price
Color: Green, 4 Pack, Size: Medium
My expectations of the quality was low. Surprisingly tho the socks were pretty good and the quality surprised me. They are soft and comfortable. Definitely recommend.
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Reviewed in the United States on May 31, 2026

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