Are you using a hydraulic hand clutch? Then you need a slave cylinder…Are you using a hydraulic foot clutch? Then you need a slave cylinder…Designed to be easy to install and use – the Excel Slave Cylinder has it all – an easy fill top-side opening, hidden bleeder and inlet and smooth styling. It works with Big Twins with 5 speed transmissions. Built from 6061-T1 billet for strength and durability. Includes mounting hardware, fill plug, bleeder and gasket.