This Screamin' Eagle clutch spring has a 10 % increase in spring rate to handle the increased power of your 98-later Evolution 1340 and 99-later Twin Cam equipped models.
SCREAMIN' EAGLE VARIABLE PRESSURE CLUTCH
Get more performance from the original equipment clutch. The Screamin' Eagle variable pressure clutch is designed to help put the added power from a Screamin' Eagle Stage kit to the pavement. This bolt-on kit harnesses the centrifugal force of spinning weights to increase the clutch capacity as the engine speed increases. The mechanism applies increasing pressure to the stock clutch pressure plate as RPM rises. The result : High torque-handling capacity without increasing clutch lever effort at idle. Kit fits behind most stock derby covers with no modifacations.
Variable pressure clutch for 2014 and later assist and slip clutch with springs. Handles up to 155ft/lbs torque.