GFB Whistling Trumpet (suits all valves)

GFB Whistling Trumpet (suits all valves)

Marsoni

M251S

$46.77

Get it in 3 business days with 1 day shipping. Friday, May 29

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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This is a great filter upgrade to your cabin filter. This is better than the Subi standard part. Fits my Subaru outback. NOTE: Subi marks their filter with an 'up' arrow; however, this filter is marked with a 'airflow' direction. Direction of air flow is toward the blower motor so it will point downward when you install it.

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Reviewed in the United States on April 25, 2026

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Jerry

New York, US

★★★★★ 5

Much cheaper than letting dealership do the job

Size: 9.7" x 9.3" x 1.8"

Filter fits well in works well

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Reviewed in the United States on May 8, 2026

Verified Purchase