{"product_id":"s-s-billet-oil-pump-73-91-style","title":"S\u0026S, billet oil pump. 73-91 style","description":"Fully CNC machined to maintain close tolerance and strict quality control. This pump is not equipped with a rear chain oiling provision. Offers several options for oil line placement. All S\u0026amp;S billet pumps comes complete with everything you need to replace the stock pump and include mounting instructions. Machined with an oil pressure relief bleed off passageway \u0026amp; relieves pressure build up on top of the valve to maintain consistent oil pressure. Oil pressure regulation bypass routes excess oil directly to the supply side of the pump \u0026amp; reduces the amount of oil returned to the tank; less foaming and cavitation.  Note: There may be more differences in Harley-Davidson crankcases than you might think. Plugging or drilling a hole is sometimes necessary. S\u0026amp;S offers a drill jig as MCS 518150. This is a special tool that is mounted on the crankcase and used as a guide to help you drill holes correctly.\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 73-91 Big Twin (NU)\u003c\/p\u003e","brand":"S\u0026S","offers":[{"title":"Default Title","offer_id":54307909337415,"sku":"519923","price":522.21,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0987\/7812\/0519\/files\/519923k_c39c19e6-765e-43b5-804f-dddde3f0c38b.jpg?v=1784484730","url":"https:\/\/www.chopperessentials.com\/products\/s-s-billet-oil-pump-73-91-style","provider":"Chopper Essentials Co.","version":"1.0","type":"link"}