{"product_id":"k-n-intake-system-harley-davidson-rk-3909-1","title":"K\u0026N Intake System-Harley Davidson (RK-3909-1)","description":"K\u0026amp;N's RK Series was developed to get more horsepower from your Twin Cam Harley-Davidson engine.  Built around the legendary K\u0026amp;N High-Flow Air Filter, the this RK Series assembly includes an innovative powder coated billet aluminum back plate that eliminates external breathers and features a built-in, dyno-tuned velocity stack.  The result is a significant airflow increase to the engine without sacrificing filtration. This RK Series assembly retains a factory appearance by utilizing the stock air cleaner cover. The RK-3910-1 comes with a larger air filter and longer spacers than the RK-3909-1.\u003cul\u003e\n\u003cli\u003eDesigned to increase horsepower \u0026amp; torque\u003c\/li\u003e\n\u003cli\u003eDyno-tuned velocity stack\u003c\/li\u003e\n\u003cli\u003eWashable and reusable\u003c\/li\u003e\n\u003cli\u003eExcellent air filtration\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K\u0026N","offers":[{"title":"Default Title","offer_id":52567302177034,"sku":"RK-3909-1","price":239.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0937\/2463\/9498\/files\/RK-3909-1_263baa62-37c6-48d4-b642-67d85b0f7846.jpg?v=1771428343","url":"https:\/\/www.sector7moto.co.uk\/products\/k-n-intake-system-harley-davidson-rk-3909-1","provider":"Sector7Moto","version":"1.0","type":"link"}