KPMI clutch springs are designed to thrive in a high stress environment where they are subjected to elevated temps, as well as high impact and shock loads. They resist taking a set, and have excellent fatigue life. They are designed to work with OEM clutch components. Manufactured from high quality chrome silicon wire, they are designed to supply 20% more plate load than stock springs. This heavy duty clutch spring set includes 10 heavy-duty springs clutch springs to ensure smooth and positive clutch operation on Big Twin models 1968 – E1984. Replaces OEM NO. 37077-68. See Additional Information below for fitment.