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K&N Round Air Filter Assembly 5.25in ID / 5in Height / 5.125in Neck Flange / 1 1/4in Drop Base

Marsoni M251S
Sale price$157.99
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Get it in 3 business days with 1 day shipping. Friday, May 29
K&N Round Air Filter Assembly 5.25in ID / 5in Height / 5.125in Neck Flange / 1 1/4in Drop BaseK&N's custom air cleaner assemblies are designed with the racer in mind. They incorporate good looks as well as the superior air flow that you expect from K&N. These custom air cleaner assemblies are designed for use with any engine that uses a round element air cleaner housing. They incorporate our famous K&N Air Filters and provide more air flow than other assemblies of this type. Available in 4 different designs, the perfect assembly is sure to be
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Your K&N Round Air Filter Assembly 5.25in ID / 5in Height / 5.125in Neck Flange / 1 1/4in Drop Base orders ship within 1-2 business days.

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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
4.5 ★★★★★
Based on 1817 reviews
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Chad altenbach
Charlottesville, US
★★★★★ 5
Made well and great fit
Fits perfectly and is made well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
D
Verified Purchase
Dalia Toppin
Charlottesville, US
★★★★★ 5
Make sure you know the size
Yes worked like a charm
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026
M
Verified Purchase
Michael Jozefczak
Natrona Heights, US
★★★★★ 5
Great fitment, made changing the oil filter easy
Perfect fit for my m760i oil filter housing.
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Reviewed in the United States on April 24, 2026
B
Verified Purchase
Benjamin Tua
Fort Morgan, US
★★★★★ 5
s tier quality
superior quality, single cast aluminum 👍
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Reviewed in the United States on May 2, 2026
M
Verified Purchase
Mr. Jibby
Charlottesville, US
★★★★★ 4
Too Tight but It Works
It doesn't really sit on very well to be honest, it tends to sit TOO tight in my opinion. Taking it off can be a hassle but at least it gets the job done, durability is good, finish is great, obviously easy to use.
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Reviewed in the United States on April 28, 2025

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