{"product_id":"harley-screamin-eagle-piston-kit-4-310-bore-x-4-5-stroke-2017-25-touring-st","title":"Harley Screamin' Eagle Piston Kit 4.310\" Bore x 4.5\" Stroke 2017-25 Touring,ST","description":"\u003cp\u003eHarley Screamin' Eagle Piston Kit 4.310\" Bore x 4.5\" Stroke 2017-25 Touring,ST\u003c\/p\u003e\u003cp\u003ePart number 21900099  a Screamin' Eagle High Compression Piston Kit from Harley-Davidson, designed for use in the 131CI Stage IV performance upgrades for Milwaukee-Eight engines. \u003c\/p\u003e\u003cp\u003eProduct Details\u003c\/p\u003e\u003cp\u003eThe kit is a key component of the largest displacement bolt-on engine upgrade offered by Harley-Davidson, providing significant gains in torque and horsepower when installed as part of a complete Stage IV kit. \u003c\/p\u003e\u003cp\u003eBore and Stroke: 4.310\" bore x 4.5\" stroke.\u003c\/p\u003e\u003cp\u003eMaterial: Forged from high-strength aluminum.\u003c\/p\u003e\u003cp\u003eDesign: Features precision-machined, coated skirts for a tight tolerance fit and quieter operation. The piston design and rings are engineered to withstand increased combustion forces.\u003c\/p\u003e\u003cp\u003eKit Contents: Includes two pistons, rings, wrist pins, and clips.\u003c\/p\u003e\u003cp\u003eLegal Status: These are 50-State U.S. EPA compliant for sale and use on all applicable\u003c\/p\u003e\u003cp\u003eFitments\u003c\/p\u003e\u003cp\u003eThe Screamin' Eagle part number 21900099 high-compression piston kit is a replacement part for Milwaukee-Eight engines that have been upgraded with a 131CI Stage IV performance kit.\u003c\/p\u003e\u003cp\u003eCompatible Models\u003c\/p\u003e\u003cp\u003eThe pistons fit specific Harley-Davidson models that are already running the 131 cubic inch (4.310\" bore x 4.5\" stroke) Stage IV engine upgrade: \u003c\/p\u003e\u003cp\u003eTouring Models: Fits 2017–2025 Harley-Davidson Touring models equipped with 131CI Stage IV kits.\u003c\/p\u003e\u003cp\u003eExcludes: 2023-later Center Cooled Touring models.\u003c\/p\u003e\u003cp\u003eExcludes: Trike models.\u003c\/p\u003e\u003cp\u003eSoftail Models: Fits 2018–2024 Harley-Davidson Softail models equipped with 131CI Stage IV kits.\u003c\/p\u003e\u003cp\u003eExcludes: 2025-later Softail models. \u003c\/p\u003e\u003cp\u003eImportant Notes\u003c\/p\u003e\u003cp\u003eStage IV Requirement: This kit is designed as a replacement specifically for the 131CI Stage IV setup; it is not for use with 128CI or other kits.\u003c\/p\u003e\u003cp\u003eEngine Control Module (ECM): All installations and replacements require an ECM calibration using a Screamin' Eagle Pro Street Tuner for proper operation.\u003c\/p\u003e\u003cp\u003eComponents: The kit is designed to work with other specific Screamin' Eagle components, such as the SE8-517 cam developed for these engines.\u003c\/p\u003e\u003cp\u003eSelling as pictured.\u003c\/p\u003e\u003cp\u003eMore than welcome to pick up at shop in butler pa \u0026amp; save shipping.\u003c\/p\u003e\u003cp\u003eNos trailer\u003c\/p\u003e\u003cp\u003e010826-JM7\u003c\/p\u003e","brand":"cyclewarehouse.online","offers":[{"title":"Default Title","offer_id":46467630432418,"sku":"21900099 NOS TRAILER","price":449.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0335\/9824\/2861\/files\/21900099tt.jpg?v=1767899234","url":"https:\/\/cyclewarehouse.online\/products\/harley-screamin-eagle-piston-kit-4-310-bore-x-4-5-stroke-2017-25-touring-st","provider":"cyclewarehouse.online","version":"1.0","type":"link"}