{"product_id":"zippers-performance-twin-cam-muscle-117-kits-harley-models-07-17-copy","title":"ZIPPERS PERFORMANCE TWIN CAM MUSCLE 124\" KITS HARLEY MODELS 07-17","description":"\u003cp\u003eZIPPERS PERFORMANCE TWIN CAM MUSCLE 124\" KITS HARLEY MODELS 07-17\u003c\/p\u003e\n\u003cp\u003eEXCHANGE KITS - CORES REQUIRED \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eZipper’s Muscle 124 Kit combines Big Bore with Big Stroke!\u003c\/strong\u003e\u003cspan\u003e At the bottom, a 4-5\/8” stroke crankshaft paired with 4-1\/8” cylinders establishes the base for 124” of Big Power. An engine this size needs specialized cylinder heads, Zipper’s ultra-high flow Stage IV CNC porting with highly modified chambers along with oversize, unshrouded valves delivers just that. New stress-relieved cylinders are precision-fit with durable forged pistons supplied with high quality 1-1-3mm rings.  Red Shift 657 cams and dual-piston tensioners, Pro-Taper pushrods, longer head bolts and E-Z Adjust pushrod covers are provided with all the gaskets needed for assembly. Case boring required for 4-1\/8” cylinders; Timken® bearing conversion, our blueprinted cam chest oil system upgrade for rock solid stability and durability are highly recommended. \u003c\/span\u003e\u003cem\u003e\u003cstrong\u003eShow ‘em your rapidly fading tail light every pass, every time!\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eThis kit uses your factory head cores sent in for modification. An exchange may be possible once your cores are cleaned, inspected and qualified for exchange.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"ZIPPERS","offers":[{"title":"TWIN CAM B SOFTAILS","offer_id":55573673541800,"sku":"zippers-performance-twin-cam-muscle-124-kits-harley-models-07-17","price":13799.95,"currency_code":"CAD","in_stock":true},{"title":"TWIN CAM A TOURING DYNA","offer_id":55573673574568,"sku":"zippers-performance-twin-cam-muscle-124-kits-harley-models-07-17","price":13299.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0747\/8273\/6552\/files\/ZIP_124_TC.jpg?v=1780288317","url":"https:\/\/speedguyscanada.com\/products\/zippers-performance-twin-cam-muscle-117-kits-harley-models-07-17-copy","provider":"THE SPEED GUYS CANADA ","version":"1.0","type":"link"}