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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 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.
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4.0 ★★★★★
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Michael Rhodes
Port Orchard, US
★★★★★ 5
Outboard thermostat
Works fine. A little pricey but better to buy the best than risk a cheap failure and destroy your engine like i did once.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
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carlos febus
Whiting, US
★★★★★ 5
Good
Good
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Reviewed in the United States on April 27, 2026
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Verified Purchase
Will Rhoden
Birmingham, US
★★★★★ 5
Works as it should
Works as it should
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Reviewed in the United States on March 24, 2026
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kelly napper
Cuba, US
★★★★★ 4
Four Stars
Just what I needed
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Reviewed in the United States on October 14, 2016
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Paul Schneeman
Phoenix, US
★★★★★ 5
Functioned as advertized.
Installed these in my Whalers 96 200 Offshore. No issues, used permatex gasket compound on aluminum engine parts after cleaning with fine brass wire wheel.
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Reviewed in the United States on November 20, 2024

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