{"product_id":"harddrive-billet-oil-pump-big-twin-1973-1991-820-50102","title":"Harddrive Billet Oil Pump - BIG Twin 1973-1991 — Harley-Davidson Super Glide, Electra Glide, Electra Glide Classic (1973-1992)","description":"\u003cp\u003eHarddrive billet oil pump for Big Twin engines, cast aluminum construction CNC machined and polished to a high-gloss finish. Upgrades 1973-1980 engines to the 1981-up oiling system that splits bottom and top end supply, increasing oil pressure to hydraulic lifters and top end.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCast aluminum, CNC machined and polished finish\u003c\/li\u003e\n  \u003cli\u003eSplits bottom and top end oil supply for increased hydraulic lifter pressure\u003c\/li\u003e\n  \u003cli\u003eRoutes surplus oil to main passage to avoid unnecessary filtering\u003c\/li\u003e\n  \u003cli\u003eIncludes gaskets, drive shaft with keys and snap ring, check ball and relief valve assemblies\u003c\/li\u003e\n  \u003cli\u003eOptional oil supply fitting locations for custom routing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harddrive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 301495\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 191361165443\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 7.65 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 7.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 3.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.84 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e China (Taiwan)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson Big Twin engines 1973 through 1991. Note: Cases manufactured 1970-1980 may require drilling for proper fitment.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWill this fit my 1973-1980 Big Twin?\u003c\/h3\u003e\n\u003cp\u003eYes, but cases from 1970-1980 may require drilling. Check your engine case before installation.\u003c\/p\u003e\n\u003ch3\u003eWhat's included in the box?\u003c\/h3\u003e\n\u003cp\u003eOil pump assembly, gaskets, drive shaft with keys and snap ring, mounting hardware, check ball, and pressure relief valve assemblies.\u003c\/p\u003e\n\u003ch3\u003eDoes this upgrade my oiling system?\u003c\/h3\u003e\n\u003cp\u003eYes — this pump splits bottom and top end oil supply like 1981-up engines, increasing pressure to hydraulic lifters and the top end.\u003c\/p\u003e\n\u003ch3\u003eCan I customize the oil routing?\u003c\/h3\u003e\n\u003cp\u003eYes — the pump offers optional oil supply fitting locations. For oil tanks below the transmission, use stock locations for best lubrication.\u003c\/p\u003e\n\u003ch3\u003eWill this require modifications to my engine?\u003c\/h3\u003e\n\u003cp\u003eMost installations bolt in, but 1970-1980 cases may need drilling — verify your case before ordering.\u003c\/p\u003e","brand":"Harddrive","offers":[{"title":"Default Title","offer_id":53035420713071,"sku":"820-50102","price":540.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_5457e1c5-8a44-422f-8ab0-d3f361d267ee.png?v=1779565169","url":"https:\/\/vtwinbikers.com\/products\/harddrive-billet-oil-pump-big-twin-1973-1991-820-50102","provider":"Vtwinbikers","version":"1.0","type":"link"}