Shift Minder for 4-Cylinder High RPMCaracteristicas: The ultimate in racing shift light products Includes a billet aluminum shift light and the shift minder control module Machined billet aluminum with an attractive black and gold anodized finish contribute to a custom rugged appearance Track tested on pro stock drag vehicles Monitors the engine rpm in order to trigger the shift light at precisely the right time Adjustable to switch at any of 64 different rpm settings with a 125 rpm