{"product_id":"s-s-cycle-91-9001-3-5-8-big-bore-cylinder-and-piston-kit","title":"S\u0026S Cycle #91-9001 - 3-5\/8\" Big Bore Cylinder and Piston Kit","description":"\u003cp\u003eInstalling this 3-5\/8\" big bore kit will increase the displacement of stock 80\" HD® shovelhead engines to 88\" using the stock 4-1\/4\" flywheels. This may also be used to build an 88\" engine in 74\" shovelheads if a 4-1\/4\" stroke flywheel assemble is also installed. The kit includes S\u0026amp;S 3-5\/8\" bore cylinders, 3-5\/8\" bore forged pistons with rings and wristpins, S\u0026amp;S stainless steel head bolts, base nuts, head gaskets, base gaskets, exhcaust gaskets, and instructions. Compression is 7.5:1. The cylinders are stock length so stock length pushrods and manifold may be used.\u003c\/p\u003e\n\u003ch4\u003eFitment\u003c\/h4\u003e\u003ctable border=\"1\" cellpadding=\"4\" style=\"border-collapse:collapse;width:100%;font-size:0.9em\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYear(s)\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel Code\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e1966-1984\u003c\/td\u003e\n\u003ctd\u003eHarley-Davidson\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003eBig Twin\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":49894357401840,"sku":"0931-0690","price":1559.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0702\/6098\/2000\/files\/jpeg__41044.1777965072.386.513.jpg?v=1782602347","url":"https:\/\/www.brlspeedshop.com\/products\/s-s-cycle-91-9001-3-5-8-big-bore-cylinder-and-piston-kit","provider":"BRL Speed Shop","version":"1.0","type":"link"}