


K&N Custom Round Filter 5-1/8in FLG / 11in Dia / 6-1/4in H
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
K&N Custom Round Filter 5-1/8in FLG / 11in Dia / 6-1/4in HK&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 Custom Round Filter 5-1/8in FLG / 11in Dia / 6-1/4in H 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 Custom Round Filter 5-1/8in FLG / 11in Dia / 6-1/4in H 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 1564 reviews
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Product Reviews
★★★★★ 5
Great Value
Style: PA99892
Great value. Dealer wants $75 to replace engine filter. The filter is just as good as the OEM one. Total time to install is less than 3 minutes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 23, 2025
★★★★★ 5
fits like OEM
Style: PA99892
This fits a 2023 Civic Sport Touring without issue. It looks indistinguishable to the OEM filter. Getting the lid off the airbox is the hardest part as it is wedged in there pretty good. Other than that, this is a very do-able DIY job, and it's a lot cheaper than having the dealer do it. I have no concerns. Thumbs up.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 6, 2025
★★★★★ 5
Excellent Value, Easy to install
Style: PA99892, Style: PA99892
This filter fit perfectly! I have a 2023 Civic Touring with about 25,000 miles. I bought it new with 2 years of service, and when I went to the dealer for my last free oil change they wanted to charge me $135 to replace my engine air filter and my cabin air filter. Ouch! I have replaced air filters before so I knew it would be a fairly easy job. I was done in about 5 minutes and the filter material is as good as the original Honda filter I replaced.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2025
★★★★★ 5
Great product
These are very good filters and the price is great. I have found that replacing both these filters at the same time works well for me
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
★★★★★ 5
OEM Quality.
Exact fit.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
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