GM 4L80-E Billet Adjustable Low Band Servo Piston Kit especially those that produce high

especially those that produce high horsepower

All kits come complete with 4130 heat-treated

which is molded over and vulcanized to a rigid steel frame

Speedmaster gaskets are designed for today's performance engines

GM 4L80-E Billet Adjustable Low Band Servo Piston Kit especially those that produce highThe purpose of the servo piston is to apply force to the rear band, controlling the band's grip on the transmission drum during gear changes. Adjusting the rear band is crucial for optimizing shift quality and transmission performance. This adjustable servo enables you to fine tune the rear band's tension with ease, even while the transmission is still installed in the vehicle.