Best in 7 days
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Ships within 48 hours · Estimated delivery Jun 29 - Jul 4
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Description
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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Best in 7 days
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Best in 7 days
Best in 7 days
4.0 ★★★★★
Based on 1234 reviews
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Product Reviews
★★★★★ 5
Kax brand
Color: CA9683
Perfect for my 07 FJ! Looks of great quality over fram low end...
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 22, 2025
★★★★★ 5
Is it to install looks better
Color: CA9683
Pitch Perfect, seems like it breathed better
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Reviewed in the United States on April 22, 2026
★★★★★ 5
Es de buena calidad
Color: CA9683
Muy buena calidad
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Reviewed in the United States on January 30, 2026
★★★★★ 5
Save on filters forever
Color: CA9683
A perfect replacement for my auto' expensive paper filter. With a little care it will outlast the car
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 18, 2025
★★★★★ 5
Quality
Color: CA9683
Definitely a improvement from Oem, have it on both Fj and Tacoma, feels so much better driving
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Reviewed in the United States on September 15, 2025
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