{"product_id":"k-n-rk-3909-1-red-intake-system-for-harley-davidson","title":"K\u0026N RK-3909-1 - Red Intake System for Harley-Davidson","description":"\u003cp\u003eK\u0026amp;N RK-3909-1 - Red Intake System for Harley-Davidson\u003c\/p\u003e\u003cp\u003eIntake System-Harley Davidson\u003c\/p\u003e\u003cp\u003eThe latest addition to K\u0026amp;N's RK Series was developed to get more horsepower from your Twin Cam Harley-Davidson engine. Provides a significant airflow increase to the engine without sacrificing filtration.\u003c\/p\u003e\u003cp\u003eK\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.\u003c\/p\u003e\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\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWarranty\u003c\/strong\u003e: \u003cspan\u003eNo-Hassle Lifetime Limited\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: \u003cspan\u003e3.3 lb (1.5 kg)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAir Box Included\u003c\/strong\u003e: \u003cspan\u003eNo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAir Filter Color\u003c\/strong\u003e: \u003cspan\u003eRed\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAir Filter Height\u003c\/strong\u003e: \u003cspan\u003e1.625 in (41 mm)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAir Filter Inside Diameter\u003c\/strong\u003e: \u003cspan\u003e6.188 in (157 mm)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAir Filter Material\u003c\/strong\u003e: \u003cspan\u003eCotton Gauze\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAir Filter Outlet Shape\u003c\/strong\u003e: \u003cspan\u003eNot Flanged\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAir Filter Shape\u003c\/strong\u003e: \u003cspan\u003eRound\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAir Filter Washable\u003c\/strong\u003e: \u003cspan\u003eYes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCARB EO Number\u003c\/strong\u003e: \u003cspan\u003eD-269-35\/55\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eClamp Color\/Finish\u003c\/strong\u003e: \u003cspan\u003eNot Applicable\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eClamp Material\u003c\/strong\u003e: \u003cspan\u003eNo Clamps Required\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eClamp Style\u003c\/strong\u003e: \u003cspan\u003eNo Clamps Required\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eClamps Included\u003c\/strong\u003e: \u003cspan\u003eNo Clamps Included\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eColor \/ Finish\u003c\/strong\u003e: \u003cspan\u003eRed Filter, Metal Top\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCouplers Included\u003c\/strong\u003e: \u003cspan\u003eNone\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEstimated Horsepower Gain\u003c\/strong\u003e: \u003cspan\u003e6.05 HP @ 5206 RPM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eInlet Diameter\u003c\/strong\u003e: \u003cspan\u003e2.25 in (57 mm)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMass Air Flow Sensor Adapter Included\u003c\/strong\u003e: \u003cspan\u003eNo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMounting Hardware Included\u003c\/strong\u003e: \u003cspan\u003eYes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eNeck Flange\u003c\/strong\u003e: \u003cspan\u003e2.25 in (57 mm)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eOil Included\u003c\/strong\u003e: \u003cspan\u003eYes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eOverall Height\u003c\/strong\u003e: \u003cspan\u003e1.688 in (43 mm)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePackage Material\u003c\/strong\u003e: \u003cspan\u003ePaperboard\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePackage Type\u003c\/strong\u003e: \u003cspan\u003eBox\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eProduct Style\u003c\/strong\u003e: \u003cspan\u003eMotorcycle Intake System\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eReplacement Filter\u003c\/strong\u003e: \u003cspan\u003eE-3972\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSize\u003c\/strong\u003e: \u003cspan\u003e7 Inch\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eStreet Legal In All US States\u003c\/strong\u003e: \u003cspan\u003eNot legal for sale or use in California on any pollution controlled motor vehicle.  NOTE: Some specific models and years may be legal in CA. Check the CARB status on your parts at knfilters.com.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eStyle\u003c\/strong\u003e: \u003cspan\u003eOval\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTop Material\u003c\/strong\u003e: \u003cspan\u003eBlack Powder Coated\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTop Style\u003c\/strong\u003e: \u003cspan\u003eMetal\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTUV Approved (Europe)\u003c\/strong\u003e: \u003cspan\u003eNo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"K\u0026N","offers":[{"title":"Default Title","offer_id":49934788657430,"sku":"KN-RK-3909-1","price":264.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0930\/0878\/9782\/files\/0_18434fc92eeca21f29123f02191f7915_normalized.jpg?v=1776816963","url":"https:\/\/www.cspracing.com\/products\/k-n-rk-3909-1-red-intake-system-for-harley-davidson","provider":"Complete Street Performance","version":"1.0","type":"link"}