{"product_id":"k-n-custom-racing-air-filter-rectangular-carbon-fiber-4in-air-box-w-2-75in-air-horn","title":"K\u0026N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w\/ 2.75in Air Horn","description":"\u003ch2\u003e\n\u003cspan style=\"color: rgb(182, 37, 37);\"\u003e\u003cstrong\u003eK\u0026amp;N Custom Racing Air Filter | Carbon Fiber Box \u0026amp; 2.75\" Air Horn\u003c\/strong\u003e\u003c\/span\u003e\u003csup class=\"superscript\" data-turn-source-index=\"1\"\u003e\u003c\/sup\u003e\n\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(182, 37, 37);\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(5, 5, 5);\"\u003eBoost performance with the K\u0026amp;N Custom Racing Air Filter. \u003c\/span\u003e\u003cspan class=\"citation-131 citation-end-131\"\u003e\u003cspan style=\"color: rgb(5, 5, 5);\"\u003eFeaturing a rectangular carbon fiber 4-inch air box and a 2.75-inch air horn for maximum airflow and heat protection.\u003c\/span\u003e\u003csup class=\"superscript\" data-turn-source-index=\"2\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003eThe \u003cb data-path-to-node=\"6\" data-index-in-node=\"4\"\u003eK\u0026amp;N Custom Racing Air Filter\u003c\/b\u003e is an elite-level induction solution designed for competitive racing and high-performance applications where every horsepower counts. This system features a lightweight, genuine \u003cb data-path-to-node=\"6\" data-index-in-node=\"211\"\u003ecarbon fiber air box\u003c\/b\u003e that provides a rigid, heat-resistant housing for the filter element, ensuring the engine draws in cooler, denser air.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\" id=\"p-rc_b8891db8ef1bc39f-52\"\u003e\u003cspan class=\"citation-130\"\u003eIntegrated into the design is a precision-engineered \u003c\/span\u003e\u003cb data-path-to-node=\"7\" data-index-in-node=\"53\"\u003e\u003cspan class=\"citation-130\"\u003e2.75-inch air horn\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-130 citation-end-130\"\u003e, which smoothes and accelerates airflow into the intake tract.\u003csup class=\"superscript\" data-turn-source-index=\"3\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e By reducing turbulence and maximizing velocity, this setup provides a significant advantage in throttle response and top-end power. \u003cspan class=\"citation-129 citation-end-129\"\u003eBuilt with K\u0026amp;N’s legendary high-flow cotton media, this filter is washable, reusable, and engineered to withstand the rigorous vibrations and pressures of the track.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eBest Uses\u003c\/b\u003e\u003c\/p\u003e\n\u003col style=\"margin-top: 0cm;\" start=\"1\" type=\"1\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003eProfessional Racing:\u003c\/b\u003e Ideal for drag, circuit, and autocross setups where weight reduction and airflow are critical.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003eCustom Induction Systems:\u003c\/b\u003e Perfect for fabricators building bespoke cold air intakes for high-performance builds.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003eTrack-Day Enthusiasts:\u003c\/b\u003e Best for drivers looking to optimize air intake velocity and mitigate engine bay heat soak.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch4 class=\"MsoNormal\"\u003e\u003cb\u003eFeatures\u003c\/b\u003e\u003c\/h4\u003e\n\u003col style=\"margin-top: 0cm;\" start=\"1\" type=\"1\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo2; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003eReal Carbon Fiber Housing:\u003c\/b\u003e Delivers a high strength-to-weight ratio and superior thermal insulation.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo2; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003e2.75-inch Velocity Stack:\u003c\/b\u003e Includes an integrated air horn to streamline airflow and increase air speed.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo2; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003eHigh-Flow Cotton Media:\u003c\/b\u003e Features K\u0026amp;N’s signature pleated oil-impregnated cotton for low restriction and high filtration.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo2; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003eRectangular 4-inch Profile:\u003c\/b\u003e A compact, space-efficient design that fits into tight engine compartments.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo2; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003eWashable \u0026amp; Reusable:\u003c\/b\u003e Designed to be cleaned and re-oiled, lasting for the life of the vehicle.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eBenefits\u003c\/b\u003e\u003c\/p\u003e\n\u003col style=\"margin-top: 0cm;\" start=\"1\" type=\"1\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo3; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003eIncreased Horsepower:\u003c\/b\u003e Minimizes intake restriction to allow the engine to breathe more efficiently.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo3; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003eEnhanced Throttle Response:\u003c\/b\u003e The air horn design reduces air turbulence for more immediate acceleration.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo3; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003eHeat Soak Mitigation:\u003c\/b\u003e The carbon fiber box shields the intake air from high engine bay temperatures.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo3; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003eLong-Term Durability:\u003c\/b\u003e Built to survive the extreme environments of racing without degrading.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo3; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003ePremium Aesthetic:\u003c\/b\u003e Provides a professional, high-end look to any performance engine bay.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"K\u0026N Engineering","offers":[{"title":"Default Title","offer_id":47729120542874,"sku":"KNN100-8593","price":944.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0429\/6124\/0218\/files\/a38fe9b5-5e1d-48c8-bce5-11e1507638bc-800.jpg?v=1775820798","url":"https:\/\/2to4wheels.com\/products\/k-n-custom-racing-air-filter-rectangular-carbon-fiber-4in-air-box-w-2-75in-air-horn","provider":"2to4wheels","version":"1.0","type":"link"}