The Big Bore kit yields excellent results with stock cylinder heads (not for Twin Cooled motors). Easy installation: no need to bore or split existing cases, just swap the cylinders (unless noted). Cylinders are constructed from premium aluminum castings with cast-in iron liners. Kits include cylinders, pistons, rings and gaskets (head, base and exhaust). 10.5:1 Compression with stock heads.Will not fit Twin Cooled models. NOTE: This project requires a skilled technician. It is the responsibility of the person assembling the parts to check all clearances and assembly specifications. Before you unwrap your parts double check your fitment and once unwrapped, look the item over before trying to install it. If you can snap a picture of the damage and notify us ASAP we can replace the order right away. Notify us right away so we start the process. We're happy to step in and get the ball rolling. An estimated restock date will be provided at the time of cancellation. The item "S&S Cycle 107 CI Big Bore Cylinder Kit Black 10.51 Compression 07-16 Harley" is in sale since Monday, January 18, 2016. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Big Bore & Top End Kits". The seller is "easternpc" and is located in Gambrills, Maryland. This item can be shipped worldwide.