{"product_id":"kn-knn66-3330r-x-stream-9in-top-assembly-drag-racing","title":"K\u0026N KNN66-3330R X-Stream 9in Top Assembly Drag Racing","description":"\u003ch4\u003eHigh-Airflow Drag Racing Top Assembly for Large-Diameter Scoop-Mount Air Cleaners\u003c\/h4\u003e\n\u003cp\u003eThe K\u0026amp;N KNN66-3330R is an X-Stream air flow top assembly designed for drag racing applications requiring maximum airflow volume through a large-diameter scoop-mount air cleaner. With a 9-inch outer diameter, 7.313-inch neck flange, and 3-inch overall height, this universal top assembly is engineered to sit atop K\u0026amp;N's X-Stream base units to create a complete assembly that channels high-velocity air down into the carburetor or throttle body while protecting the engine from debris in the staging lanes and on the track.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e9-Inch Outer Diameter:\u003c\/strong\u003e Large outer diameter maximizes air flow surface area for carbureted or throttle body applications demanding high-volume induction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eX-Stream Design:\u003c\/strong\u003e Vented top directs air flow efficiently down through the base filter element while acting as a scoop mount to feed forced induction from a hood scoop\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7.313-Inch Neck Flange:\u003c\/strong\u003e Large neck flange provides a stable mounting surface over the base filter assembly with positive retention\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-Inch Height:\u003c\/strong\u003e Low-profile 3-inch height keeps the overall assembly height manageable for hood scoop fitment and carb clearance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Drag Racing Fit:\u003c\/strong\u003e Not vehicle-specific; designed for any drag racing build using a compatible X-Stream base unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eK\u0026amp;N Engineering Quality:\u003c\/strong\u003e Manufactured to the same dimensional and material standards as K\u0026amp;N's full air filter product line\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eKNN66-3330R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eK\u0026amp;N Engineering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e9 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNeck Flange Diameter\u003c\/td\u003e\n\u003ctd\u003e7.313 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e3 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStyle\u003c\/td\u003e\n\u003ctd\u003eX-Stream Top Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\u003c\/td\u003e\n\u003ctd\u003eUniversal (drag racing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1x X-Stream top assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eAbout K\u0026amp;N Engineering\u003c\/h4\u003e\n\u003cp\u003eK\u0026amp;N Engineering has been manufacturing performance air filters, intake systems, and air flow components since 1969. Based in Riverside, California, K\u0026amp;N products are used across motorsport disciplines from drag racing and circle track to off-road and road racing, as well as on millions of street-driven performance vehicles worldwide.\u003c\/p\u003e\n\n\u003ch4\u003eRelated Parts on Our Site\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/air-intakes\"\u003eBrowse All Air Intake Products at Black Ops Auto Works\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\u003cstrong\u003eWhat is this top assembly?\u003c\/strong\u003e\u003cp\u003eThis is a K\u0026amp;N KNN66-3330R X-Stream air flow top assembly with a 9-inch outer diameter, 7.313-inch neck flange, and 3-inch height, designed for drag racing air cleaner builds that use a hood scoop to force-feed air to the engine. It is a universal component for use with compatible X-Stream base filter units.\u003c\/p\u003e\n\u003cstrong\u003eIs a base filter included?\u003c\/strong\u003e\u003cp\u003eNo. This is the top assembly only. A compatible X-Stream base filter unit is required to complete the air cleaner assembly; the base unit and any carb hat or adapter plate are sold separately.\u003c\/p\u003e\n\u003cstrong\u003eWhat vehicles does this fit?\u003c\/strong\u003e\u003cp\u003eThis is a universal drag racing component not designed for any specific vehicle. It is intended for competition builds using a hood scoop-fed air cleaner setup. Confirm that your base unit dimensions match the 7.313-inch neck flange before ordering.\u003c\/p\u003e\n\u003cstrong\u003eCan this be used on a street car?\u003c\/strong\u003e\u003cp\u003eThis is primarily a competition-oriented component, but it can be used on any street vehicle with a compatible X-Stream base assembly and sufficient hood clearance. Street use without a scoop means the top primarily acts as a rain and debris deflector over the filter element.\u003c\/p\u003e\n\u003cstrong\u003eWhat is the purpose of the X-Stream design?\u003c\/strong\u003e\u003cp\u003eThe X-Stream design uses a vented top configuration that directs inbound scoop air efficiently down through the filter element to the carburetor or throttle body. It is engineered to maximize airflow volume in applications where a ram-air or hood scoop is feeding forced air into the air cleaner from above.\u003c\/p\u003e\n\u003cstrong\u003eDoes this fit a standard 14-inch air cleaner base?\u003c\/strong\u003e\u003cp\u003eNo. This top assembly is designed for K\u0026amp;N's X-Stream base units, not for standard round air cleaner bases. The 9-inch outer diameter and 7.313-inch neck flange are specific to the X-Stream product family. Verify base unit compatibility before ordering.\u003c\/p\u003e\n\u003cstrong\u003eIs this component reusable?\u003c\/strong\u003e\u003cp\u003eYes. The top assembly itself does not require replacement as part of routine maintenance. Maintenance intervals apply to the underlying filter element in the base unit, not the top cap.\u003c\/p\u003e\n\u003cstrong\u003eWhat material is the top assembly made from?\u003c\/strong\u003e\u003cp\u003eThis component is manufactured to the same dimensional and material standards as K\u0026amp;N's air cleaner product line. Refer to K\u0026amp;N's product documentation for the specific material call-out if material confirmation is needed for your application.\u003c\/p\u003e\n\n\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eConfirm the X-Stream base unit is properly installed and seated on the carburetor or throttle body adapter.\u003c\/li\u003e\n\u003cli\u003ePosition the top assembly over the base filter element, aligning the neck flange concentrically with the base unit.\u003c\/li\u003e\n\u003cli\u003ePress the top assembly down onto the base unit until fully seated and the flange sits flush against the top of the filter element.\u003c\/li\u003e\n\u003cli\u003eSecure the top assembly to the base unit per the recommended retention method (wing nut or stud, depending on base unit configuration).\u003c\/li\u003e\n\u003cli\u003eVerify the assembly is centered over the carb or throttle body and does not contact the hood scoop opening or adjacent components.\u003c\/li\u003e\n\u003cli\u003eIf using with a hood scoop, align the scoop opening directly over the top assembly before fastening the scoop in final position.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"K\u0026N Engineering","offers":[{"title":"Default Title","offer_id":46058681008207,"sku":"KNN66-3330R","price":251.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/K_N_X-Stream_9in_Top_Assembly_Drag_Racing.png?v=1784150535","url":"https:\/\/www.blackopsautoworks.com\/products\/kn-knn66-3330r-x-stream-9in-top-assembly-drag-racing","provider":"Black Ops Auto Works","version":"1.0","type":"link"}