Control Rig:
p266: "When you’re jumped into a vehicle, drone, or other device, the limits of that device are increased by the rating of your control rig. This includes vehicle and drone Sensor, Speed, and Handling, and the Accuracy of mounted weapons when used by the rigger."
p452: "Additionally, the rating of your control rig is added to the Handling and Speed of any vehicle you are jumped into."
Assuming p266 is correct and a vehicle that's rigged cannot suddenly go up to 8x as fast, p452 should be rephrased to make clear the control rig rating merely boosts your [Speed] limits, not the vehicle attribute Speed itself. This basically is the difference between being allowed to keep more hits in Speed Chases, and being able to break the speed of sound with ground vehicles.