Seller notes

S&S Cycle 910-0685 M8 128in. Big Bore Kit - 4.250 Bore, 4.5 Stroke, Non-Highlighted Fins - Black Available for both 107 and 114 M8 models.. Available in both highlighted and non highlighted versions. Wrinkle black finish. Non-highlighted fins. Bolt-on kit. Largest bore possible without machining required. includes gaskets and hardware required for installation. 4.250in. bore. Forged pistons. 10.5:1 compression ratio. Made in USA. fits H-D FLDE Deluxe 107 2018-2020 fits H-D FLFB Fat Boy 107 2018-...

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