


K&N Round Air Filter Assembly 14in. ID / 4..12in. Height / 5.125in. Neck Flange / 7/8in. Drop Ba
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
K&N Round Air Filter Assembly 14in. ID / 4..12in. Height / 5.125in. Neck Flange / 7/8in. Drop BaK&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
Quick Dispatch:
Your K&N Round Air Filter Assembly 14in. ID / 4..12in. Height / 5.125in. Neck Flange / 7/8in. Drop Ba 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 Round Air Filter Assembly 14in. ID / 4..12in. Height / 5.125in. Neck Flange / 7/8in. Drop Ba 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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4.8 ★★★★★
Based on 1030 reviews
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Product Reviews
★★★★★ 5
nice quality
Size: 1.9" x 9.9" x 11.4"
I happen to be a fan of K&N air filters. Fit perfect in my vehicle. Seems like a much nicer quality filter than the cheapo filters from the parts store.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 7, 2026
★★★★★ 5
excellent product
Size: 1.9" x 9.9" x 11.4"
easy to install
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
★★★★★ 5
Great purchase!
Size: 1.9" x 9.9" x 11.4"
This has worked out quite well. I have had it since 2023 and have been cleaned thru about 6 maintenance schedules. It's been 2 yrs and it's in great shape. Worth every penny.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 21, 2025
★★★★★ 4
Really filters the cabin air
Size: 1.9" x 9.9" x 11.4"
K&N filters are always a cut above. Can’t say the same for service/support after the sale.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 31, 2026
★★★★★ 5
quick and easy fit
Size: 1.9" x 9.9" x 11.4"
Instructions made it a very quick and easy fit
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 17, 2026