{"product_id":"mcs580355","title":"S\u0026S M8 107\" to 124\" Big Bore Piston Kit. +.010\" – 2018–2024 107\" Softail; 2017–2024 107\"…","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003e11.1:1 compression ratio. Piston kit includes forged pistons; rings; wristpins and clips. Crankcases do not require boring. Big bore 4.250\" cylinders are required; OEM cylinders can not be bored to 4.250\". 107\" to 124\" pistons come with 1.143\" deck height and are compatible with the OEM 107\" 4.375\" stroke.Note: For 4.250\" big bore cylinders only see S\u0026amp;S 574121 (black wrinkle) or 547122 (black wrinkle with highlighted fins). Note: Gaskets are sold separately as 591055 head gaskets; 591054 base gaskets or 591056 head \u0026amp; base gasket kit. Note: S\u0026amp;S recommends an S\u0026amp;S 550 series cam; which are available in both chain or gear drive. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install \u0026amp; make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e18-24 107\" Softail\u003c\/li\u003e\n\u003cli\u003e17-24 107\" FLT\/Touring (NU)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e S\u0026amp;S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTON KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e KIT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 580355\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePart Numbers\u003c\/h2\u003e\n\u003cp\u003eMCS Part Number: 580355\u003cbr\u003eManufacturer Part Number: 920-0141\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":57371153006979,"sku":"MCS580355","price":680.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/580356k.jpg?v=1785952489","url":"https:\/\/hogparts.co.uk\/products\/mcs580355","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}