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The K&N Generation 2 carbon fiber 4-inch air box with a 2.75‑inch air horn is a lightweight, durable racing airbox intended for racers moving away from traditional multi‑Siamese stacks. Constructed from ultra‑light carbon fiber, it includes air horn seals for easier installation and a tight seal. Like other K&N filters, it is washable and reusable using K&N cleaner and oil.
K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air Horn
