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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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Get it in 3 business days with 1 day shipping. Friday, May 29
K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air HornLight weight yet durable, K&N's Generation 2 Carbon Fiber Air Boxes are a must for any racer currently using traditional multi Siamese stacks. Constructed from ultra lightweight carbon fiber these filters provide ample air flow for your racing needs. They come with air horn seals to provide better sealing and easy installation. As with all K&N air filters, Generation 2 Carbon Fiber Air Boxes are washable and reusable. Simply use K&N cleaner and oil to
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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
4.7 ★★★★★
Based on 51 reviews
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Verified Purchase
Jean Therasse
New York, US
★★★★★ 5
Excellent fit and great quality”
This filter fit perfectly and was very easy to install. The quality feels solid, and it made an immediate difference in air flow. It’s a reliable replacement at a much better price than the dealer. I’ll definitely be buying this brand again for future changes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 17, 2025
R
Verified Purchase
Robert Weiner
Dallas, US
★★★★★ 5
Super deal
This was a great replacement and much cheaper than most.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
G
Verified Purchase
Geff Chu
Phoenix, US
★★★★★ 5
Nice replacement filter
Fits perfectly
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Reviewed in the United States on April 18, 2026
N
Verified Purchase
Nicolas
Phoenix, US
★★★★★ 5
Service
Size: 14-22 2.0L hybrid
Looks like engine air filter, it’s smaller than needed; but needs to be compared. Haven’t looked at air cabin yet
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
S
Verified Purchase
Shreya R
Battle Creek, US
★★★★★ 5
Perfect for my Honda Accord 2022
Size: 14-22 2.0L hybrid
Perfect for my 2022 Honda Accord hybrid EXL.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026

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