Note: Bore: 1.25 In.; with Reservoir, without Sensor. Model Ram 1500, Ram 2500, Ram 3500. Note Bore: 1.25 In.; with Reservoir, without Sensor. For Dodge Ram 1500 1998-2001 All Engine Power Brakes. For Dodge Ram 2500 1998-2000 All Engine Power Brakes, To 7/03/00.