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

Light weight yet durable, K\\u0026amp;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\\u0026amp;N air filters, Generation 2 Carbon Fiber Air Boxes are washable and reusable. Simply use K\\u0026amp;N cleaner and oil to service your filter.