{"product_id":"s-s-billet-tappet-guides-for-shovel-for-harley-davidson","title":"S\u0026amp;S, Tacho Guides for Shovelhead and Evo","description":"\u003cp\u003ePolished.\u003cbr\u003e Allows you to use the improved hydraulics of the Evo tappets on a Shovel.\u003cbr\u003e When adapting 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.\u003cbr\u003e If desired, you can grease the top end through the pushrods (with Quickee 512497 pushrods), Evolution style, when using S\u0026amp;S Shovel roller rockers (512493).\u003cbr\u003e Note: An Evo cam will have about a 9% reduction in valve lift due to the lower S\u0026amp;S Shovelhead rocker arm ratio (1.5), compared to the stock Evo rocker arm ratio (1.625).\u003cbr\u003e The standard rocker arm ratio on Shovelhead rockers is 1.43.\u003cbr\u003e Note: Adjustable pushrods are required.\u003cbr\u003e 512511 pushrod retainers\/clips\/fixers are also required when using 512494 Evo style tappet blocks for Shovel.\u003cbr\u003e Because these tappet blocks are longer, a shorter 2.800\" long retainer is required to achieve proper pushrod cover spring tension.\u003cbr\u003e\u003cbr\u003e Fits: \u0026gt; 66-84 Shovelhead (NU). With Evo tappets, Evo cam, S\u0026amp;S Quickee pushrods for easy installation\u003c\/p\u003e","brand":"S\u0026S","offers":[{"title":"Default Title","offer_id":23049615769685,"sku":"MC512494","price":866.47,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1606\/2595\/products\/512494k.jpg?v=1571316505","url":"https:\/\/california-motorcycles.com\/en\/products\/s-s-billet-tappet-guides-for-shovel-for-harley-davidson","provider":"California Motorcycles","version":"1.0","type":"link"}