


K&N Universal Air Filter (4in. Flange / 6in. Base OD / 4-5/8in. Top OD / 6in. Height)
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
K&N Universal Air Filter (4in. Flange / 6in. Base OD / 4-5/8in. Top OD / 6in. Height)K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio controlled cars, generators, snowmobiles, tractors, and other applications. Regardless of the angle or offset diameter of the air intake, there is probably a K&N Universal air filter for your equipment. All filters are constructed with ultra strong molded pliable rubber flanges which absorb vibration and allow for secure
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Your K&N Universal Air Filter (4in. Flange / 6in. Base OD / 4-5/8in. Top OD / 6in. Height) orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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You'll receive a tracking link by email once your K&N Universal Air Filter (4in. Flange / 6in. Base OD / 4-5/8in. Top OD / 6in. Height) 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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4.1 ★★★★★
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Product Reviews
★★★★★ 5
Looks good and fits
It looks good and fits perfectly; other than that, I have no idea how to tell if it's better or worse than anything else.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
★★★★★ 5
Happy with purchase
Works as well at the fraction of the price. Very happy with the purchase. Very easy to install
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Reviewed in the United States on December 11, 2025
★★★★★ 5
Great OEM replacement at hlaf the cost
Looks exactly like the OEM filter a quality product. it is the same size fit and performance. Filter replacement is fast 10 min tops, it's crazy how much a dealer charges to replace it.
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Reviewed in the United States on April 15, 2025
★★★★★ 5
As good as Honda OEM
Perfect fit. Lasts as long as OEM for 25% of the price.
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Reviewed in the United States on December 27, 2025
★★★★★ 5
Great fit
Perfect fit. FYI - I bought the exact same one on EBAY FOR $11.78
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Reviewed in the United States on May 2, 2026