{"product_id":"s-s-shovel-tappet-guides-for-evo-tappets","title":"S\u0026S Shovel tappet guides for Evo tappets","description":"\u003cp\u003ePolished. Allows you to use the improved hydraulics of Evo tappets in a Shovel. When retro-fitting these billet aluminum tappet blocks to a Shovel engine you must use 86-99 Evolution Big Twin hydraulic lifters, an Evo style camshaft and S\u0026amp;S Quickee pushrods. If desired you can oil the top end through the pushrods (with 512497 Quickee pushrods), Evolution style, when using S\u0026amp;S Shovel roller rockers (512493). \r\n\r\nNote: An Evo cam will have about 9% reduction in valve lift due to the lower S\u0026amp;S Shovelhead rocker arm ratio (1.5), when compared to the stock Evo rocker arm ratio (1.625). The stock rocker arm ratio of Shovelhead rockers is 1.43. \r\nNote: Adjustable pushrods are required. Also required are 512511 pushrod retainers\/clips\/keepers when using 512494 Evo style tappet blocks for Shovel. Since these tappet blocks are longer a shorter retainer of 2.800\" length is required for correct pushrod cover spring tension.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Tappet blocks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 33-5450\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"S\u0026S","offers":[{"title":"Default Title","offer_id":63007531991370,"sku":"MSH-512494","price":911.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0016\/9546\/files\/512494k.jpg?v=1787164293","url":"https:\/\/partsdenmark.com\/products\/s-s-shovel-tappet-guides-for-evo-tappets","provider":"Parts Denmark","version":"1.0","type":"link"}