{"product_id":"s-s-124-twin-cam-softail-hot-set-up-kit-with-heads-black","title":"S\u0026S, 124\" Twin Cam Softail hot set-up kit with heads. Black","description":"Black wrinkle painted with highlighted fins. Will upgrade your stock 96\" or 103\" engine to 124\" capacity. Kit comes complete with stroker flywheels; big bore cylinder \u0026amp; flat-top piston kit that gives a 10.8:1 CR with the included 91cc high flow heads. The 640 Easy Start gear driven cams provide the lift required to let this engine breathe but insures easy turn-over with stock starter \u0026amp; battery.   Note 1: Stock cases must be machined to accept the larger 4-1\/8\" big bore cylinders. Kit adds .096\" to engine height.  Note 2: You will build a serious high performance engine. It is therefore not compatible with stock ignition and stock (too small) throttle housings. A large throttle housing; as the 558678 S\u0026amp;S 58mm single bore unit; and high performance ECU is required. Carbureted engines will require a ignition system with adjustable advance curves and large carburetor; as the S\u0026amp;S Super G or similar. Kits are machined to be compatible with stock length manifolds.  Note 3: S\u0026amp;S recommends MCS 978519 JIMS crankcase bearing insert; for 03-17 Twin Cam models; to replace the stock roller bearing for the stronger early style Timken bearing. See MCS 978517 for required JIMS tool. The correct Timken bearing can be ordered as MCS 508960 \/ OEM 9028.\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 07-17 Softail (NU)\u003c\/p\u003e","brand":"S\u0026S","offers":[{"title":"Default Title","offer_id":54307824271687,"sku":"565149","price":6841.06,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0987\/7812\/0519\/files\/565149k.jpg?v=1784482478","url":"https:\/\/www.chopperessentials.com\/products\/s-s-124-twin-cam-softail-hot-set-up-kit-with-heads-black","provider":"Chopper Essentials Co.","version":"1.0","type":"link"}