{"product_id":"knrk3930","title":"K\u0026N Custom Assembly KRK-3930","description":"\u003cp\u003eThe K\u0026amp;N RK-3930 Air Intake System was designed to get more horsepower from your Twin Cam Harley-Davidson engine. Built around the legendary K\u0026amp;N High-Flow Air Filter, this RK Series assembly includes an innovative powder- coated billet aluminium backplate 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.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eIncreases horsepower.\u003c\/li\u003e \u003cli\u003eWashable and reusable.\u003c\/li\u003e \u003cli\u003eFits inside stock cover.\u003c\/li\u003e \u003cli\u003eProvides increased airflow.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eEstimated Horsepower Gain: 8.43 HP @ 3700 RPM\u003c\/li\u003e \u003cli\u003eReplacement Filter: E-3972\u003c\/li\u003e \u003cli\u003eAir Filter Material: Cotton Gauze\u003c\/li\u003e \u003cli\u003eSize: 9 Inch\u003c\/li\u003e \u003cli\u003eInlet Diameter: 2.469 in (63 mm)\u003c\/li\u003e \u003cli\u003eOverall Height: 1.875 in (48 mm)\u003c\/li\u003e \u003cli\u003eWeight: 3.5 lb (1.6 kg)\u003c\/li\u003e \u003cli\u003eNeck Flange: 2.469 in (63 mm)\u003c\/li\u003e \u003c\/ul\u003e","brand":"K\u0026N","offers":[{"title":"Default Title","offer_id":47473115529466,"sku":"KNRK3930","price":404.05,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/0779\/3402\/files\/KNRK3930.jpg?v=1780132088","url":"https:\/\/www.xpertmotogear.com.au\/products\/knrk3930","provider":"Xpert Moto Gear","version":"1.0","type":"link"}