★★★★★ 5
good value
Size: 16 Fl Oz (Pack of 1)
great price, good product
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Reviewed in the United States on May 19, 2026
BMW Exhaust Valve/Flap Controller
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
BMW Exhaust Valve/Flap ControllerValvetronic Designs is proud to now offer our exhaust controllers for use with most BMWs. This small plug and play unit connects into the factory wiring harness and allows the driver full control of the exhaust valve whenever they want. For too long enthusiasts have had to pay too much for command of their exhaust. We solve that issue. These controllers connect to the vacuum solenoid in the trunk to provide the driver control over their exhaust flap.
Quick Dispatch:
Your BMW Exhaust Valve/Flap Controller orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your BMW Exhaust Valve/Flap Controller ships.
Need Help?
Questions about BMW Exhaust Valve/Flap Controller, sizing, or delivery? We're just an email away.
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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.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.0 ★★★★★
Based on 687 reviews
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Product Reviews
★★★★★ 5
Better than Biotene
Size: 16 Fl Oz (Pack of 1)
Works better and lasts longer than Biotene.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
★★★★★ 5
My first choice to make my mouth fresh and clean
Size: 16 Fl Oz (Pack of 1)
I have a lot of trouble sleeping and using the sleep apnea machine dries my mouth. This mouth wash is my favorite for feeling clean and refreshed. It really helps with that dry mouth I get from using the sleep apnea machine
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
★★★★★ 5
Really solves dry mouth with a great taste and convenience.
Great tasting lozenges that actually work and offset dry mouth. They have a cool, refreshing taste. I've had dry mouth issues for years and found these to be the best and prefer the lozenges over Biotene's other products. I carry a sleeve with me at all times and leave one in the car. I really love this product.
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Work great for instant relief of dry mouth.
They work great for a dry mouth. I like them a lot more than the Biotene Dry Mouth Spray or mouth wash. They taste good & relieve the super dryness that occurs due to my low electrolytes. Plus, I can carry them in my purse or to the gym.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 30, 2026
