★★★★★ 5
Good
Works great!
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Reviewed in the United States on November 5, 2024
K&N X-Stream Top Assembly 5.125in Neck Flange / 14in D / 6.62in H w/Vent
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
K&N X-Stream Top Assembly 5.125in Neck Flange / 14in D / 6.62in H w/VentNot only does the K&N XStream add filter area, it actually redirects airflow inside the filter to pull in more air through the side pleats for even greater performance efficiency. Cleanable and reusable, the XStream Air Flow Top filter delivers the best protection available for your engine. Installation Instructions Technical Bulletin Technical Bulletin
Quick Dispatch:
Your K&N X-Stream Top Assembly 5.125in Neck Flange / 14in D / 6.62in H w/Vent 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 K&N X-Stream Top Assembly 5.125in Neck Flange / 14in D / 6.62in H w/Vent ships.
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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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4.2 ★★★★★
Based on 759 reviews
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Product Reviews
★★★★★ 1
Cheap
Cheaply made
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Reviewed in the United States on December 30, 2025
★★★★★ 5
Great quality and price
Perfect fit. Received quicker than boat shop
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Reviewed in the United States on June 22, 2025
★★★★★ 5
Easy to install if you watch some online how to videos.
The water pump kit worked great on my 35 year old, 2 stroke, 100hp, Mercury Outboard.
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Reviewed in the United States on May 15, 2025
★★★★★ 4
Very good shipped and received fast
Missing one bottom gasket. Maybe factor made changes from old style
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Reviewed in the United States on July 10, 2021
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