{"product_id":"zippers-performance-80-80-evolution-big-twin-kit-harley-models-copy","title":"ZIPPERS PERFORMANCE TWIN CAM SLEEPER 103\" KITS HARLEY MODELS 07-17","description":"\u003cp\u003eZIPPERS PERFORMANCE TWIN CAM SLEEPER 103\" KITS HARLEY MODELS 07-17\u003c\/p\u003e\n\u003cp\u003eEXCHANGE KITS - CORES REQUIRED \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eZipper’s Sleeper 103 kit is an easy and affordable upgrade for 2007-up 96” Twin Cam® engines.\u003c\/strong\u003e\u003cem\u003e\u003cspan\u003e \u003c\/span\u003eYour cylinders are precision-bored from 3.750” to 3.875” with forged 10.25:1 pistons to boost displacement to 103”, while your stock cams are replaced with your choice of our Red Shift 525 or 528 grinds. The 525’s are designed for heavily loaded bikes and build huge torque just off idle with less top end power, while the 528 cams shift power and torque to the right, across the entire RPM range with stock heads. Gain even more power with (1) Zipper’s optional Stage 1 headwork and (2) improve longevity with critical oil system blueprinting by adding our cam chest upgrade that includes our billet cam plate, dual-piston cam tensioners, full-compliment cam bearings and quality USA lifters.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eWith power peaking at 5,000 RPM, this kit is a great choice for the rider who rarely pegs the throttle to red line, but rather enjoys the super-strong pull of low \u0026amp; mid-range torque!\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThis kit uses your factory cylinder (and heads if Stage 1 option is chosen) cores sent in for modification. An exchange may be possible once your cores are cleaned, inspected and qualified for exchange.\u003cbr\u003eNot legal for sale or use in California on any pollution controlled motor vehicle.\u003cbr\u003eNot legal for sale or use on any EPA pollution controlled motor vehicle.\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":"Default Title","offer_id":55573663088808,"sku":null,"price":2599.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0747\/8273\/6552\/files\/ZIP_SLEEPER_103.jpg?v=1780288119","url":"https:\/\/speedguyscanada.com\/products\/zippers-performance-80-80-evolution-big-twin-kit-harley-models-copy","provider":"THE SPEED GUYS CANADA ","version":"1.0","type":"link"}