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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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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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4.3 ★★★★★
Based on 1776 reviews
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Brenda V.
Waukegan, US
★★★★★ 5
Good taste, easy to take and has great benifits
Flavor Name: Orange, Size: 15 Ounce (Pack of 1), Flavor Name: Orange, Size: 15 Ounce (Pack of 1)
Loved this fiber, it was suggested to me by my doctor. Its suppose to help with blood sugar regulations and digestive health. It has a good taste to it which makes it enjoyable.
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Reviewed in the United States on May 18, 2026
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Richie F.
Lowell, US
★★★★★ 5
Works great and easy to stick with daily
Flavor Name: Orange, Size: 15 Ounce (Pack of 1), Flavor Name: Orange, Size: 15 Ounce (Pack of 1)
I started taking Metamucil to improve my digestion, and it’s been a great addition to my daily routine. After using it consistently, I’ve noticed everything feels more regular and just overall better. One thing I really like is how easy it is to take. It mixes well and goes down pretty smooth, especially if you drink it right away. It’s not nearly as bad as I expected taste-wise. I also feel like it helps me stay a little fuller throughout the day, which has been a nice bonus. No stomach issues or discomfort for me, and it’s been very consistent in how it works. Overall, I’m really happy with the results and plan to keep using it long term.
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Reviewed in the United States on April 22, 2026
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Brenda
Port Orchard, US
★★★★★ 5
Great taste!
Flavor Name: Orange, Size: 15 Ounce (Pack of 1)
Love the Metamucil taste and it works well.
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Reviewed in the United States on May 31, 2026
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Nyemar
Lowell, US
★★★★★ 4
Wonderful tase & rapid response
Flavor Name: Orange, Size: 15 Ounce (Pack of 1)
Got it yesterday and the effect is immediate. Love the flavor too. It’s great knowing that I might have finally found the cure for my gut. Try it 👍
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Reviewed in the United States on May 9, 2026
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Geoffrey Gauntt
Lake Worth, US
★★★★★ 5
Glad I Gave It a Try
Flavor Name: Orange, Size: 15 Ounce (Pack of 1), Flavor Name: Orange, Size: 15 Ounce (Pack of 1)
I wasn't sure if this Metamucil fiber supplement would make much of a difference, but after taking it consistently, I'm really glad I decided to try it. The results weren't instant, but over time I noticed that I felt lighter, cleaner, and just generally better overall. The sugar-free formula is a nice bonus, and it's easy to make part of a daily routine. I've found that consistency is key, and once I started taking it regularly, I could definitely tell a difference. If you're on the fence about trying a fiber supplement, this one has worked very well for me. It's a simple addition to my day that has had a noticeable positive impact. I'll definitely keep using it.
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Reviewed in the United States on June 2, 2026

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