{"product_id":"4-big-bore-bolt-on-cylinder-and-piston-kit","title":"4\" Big Bore Bolt-On Cylinder and Piston Kit","description":"The Screamin’ Eagle 4\" Big Bore Bolt-On Cylinder and Piston Kit offers a significant power increase by boosting engine displacement. It is engineered to take 96 or 103 cubic inch Twin Cam V-Twin motors up to 110 cubic inches. Unlike older methods that required extensive engine case modification, this kit features a 4\" bore that fits into the existing case bore without alteration. This direct bolt-on design saves time and expense associated with engine teardowns and re-boring.\n\nThe kit is designed to deliver more torque throughout the RPM range, especially beneficial for engines already equipped with Stage III or Stage IV performance kits, adding approximately 7 cubic inches of displacement. It includes all necessary components such as front and rear cylinders, system-matched pistons with rings, and breathers. The construction utilizes aluminum and increases the bore from 3-7\/8” to 4”.\n\nInstallation requires careful attention to several specific requirements. All EFI models will need ECM calibration, which is a separate purchase and crucial for proper operation; failure to do so can result in severe engine damage. For calibration options, consult the Screamin' Eagle Pro Catalog or a Harley-Davidson dealer. The kit is intended for High Performance or Racing applications only and is not legal for sale or use on pollution-controlled motor vehicles. This kit may also void the vehicle's limited warranty. It is important to note that stock CVO pistons should not be used with these 4\" cylinders due to potential interference with the crankcase.","brand":"Screamin' Eagle","offers":[{"title":"Default Title","offer_id":52689385947448,"sku":"92500039","price":1195.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687676741.jpg?v=1784906078","url":"https:\/\/store.motormia.co\/products\/4-big-bore-bolt-on-cylinder-and-piston-kit","provider":"MOTORMIA","version":"1.0","type":"link"}