{"product_id":"s-s-129-big-bore-kit-black-cylinders","title":"S\u0026S, 129\" big bore kit. Black cylinders","description":"\u003cp\u003e\u003c\/p\u003e\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003e2102cc kit. Converts the 107\" engine to 129\". Largest possible 4.320\" bore bolt-in big bore kit. Stroker flywheels not required. Works with stock crankcases, case boring is not required, stock flywheels, stock heads and retains stock engine height. Kit includes a forged 4.320\" big bore piston kit, black wrinkle powder coated 4.320\" big bore cylinders, 2 MLS (Multi-Layer-Steel) .030\" head gaskets, 2 cylinder base gaskets, 4 cylinder dowels and an S\u0026amp;S cubic inch cam cover batch. Black powder coated finish to match OEM finish. \u003cbr\u003eNote: For the 132\" kit (to convert 114\" engines) S\u0026amp;S measured 135.51HP and 145.83TQ with stock heads, a 550 cam, stock throttle body and a high flow Stealth air cleaner kit. \u003cbr\u003eNote: Tuning of fuel injection and ignition may be required. \u003cbr\u003eNote: S\u0026amp;S advises 576972 S\u0026amp;S head bolt kit for all big bore applications.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\u003ctr\u003e\n\u003cth\u003eUnit\u003c\/th\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/table\u003e\u003ch2\u003eFitment\u003c\/h2\u003e\u003cp\u003e17-24 M8 with 107\" engine (NU)\u003c\/p\u003e\u003ch2\u003ePart numbers\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSupplier SKU\u003c\/th\u003e\n\u003ctd\u003e974961\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer part\u003c\/th\u003e\n\u003ctd\u003e910-0844A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":58637530562904,"sku":"974961","price":1631.52,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0975\/8235\/0680\/files\/974961k.jpg?v=1791041373","url":"https:\/\/deathproofcycles.com\/products\/s-s-129-big-bore-kit-black-cylinders","provider":"Deathproof Cycles","version":"1.0","type":"link"}