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K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air Horn

Marsoni M251S
Sale price$472.50
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K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air HornSKU: 100 8593 UPC: 024844363206 K&N 100 8593 Custom Racing Air Filter Rectangular Carbon Fiber 4in Air Box w 2. 75in Air Horn K&N 100 8593 Generation 2 Carbon Fiber Air Box assembly delivers high airflow for custom racing engines replacing multi siamese stacks. This lightweight rectangular 4 inch tall filter setup with 2. 75 inch air horn flange fits universal racing applications to increase horsepower and throttle response. Washable filter media
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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.
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4.7 ★★★★★
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Verified Purchase
Michael Garcia
Louisville, US
★★★★★ 5
Good value
Good value. Much better to get a new pump
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
M
Verified Purchase
Mike
Pawtucket, US
★★★★★ 1
Buy OEM Honda for $2 - Suction side o-ring does not fit right
No good. Suction side o-ring doesn't fit right and immediately sucked air. Spend the $2 at a Honda dealer and get the original orange 91345-RDA-A01 o-ring. Fits much better and instantly quiet power steering pump.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
D
Verified Purchase
David
Louisville, US
★★★★★ 5
Worked perfect
Great deal
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Reviewed in the United States on January 23, 2026
M
Verified Purchase
Manuel Miranda
Draper, US
★★★★★ 5
Very good
Size: CRV (2023-2025) 1.5L Gas
Look like original
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Reviewed in the United States on April 26, 2026
I
Verified Purchase
Isaiah
West Palm Beach, US
★★★★★ 5
Fits 2023 Honda Civic Sport Touring Hatchback
Size: CRV (2023-2025) 1.5L Gas
Fit as a smooth clean replacement for OEM civic filters.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 22, 2025

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