B&M Governor Recalibration Kit allows you to easily recalibrate the shift points of your transmission after you install it. The readjustment is possible through the governor cover located on the side of your transmission and takes no longer than a couple of minutes. This kit is ideal for effortless transmission swaps on lightweight vehicles and vehicles with low rear gear cargo. It comes packaged with an O-ring, a gasket, weights, springs and all other required hardware. Please keep in mind that this kit is not legal for use on emission controlled vehicles.