How to add boost effect to A-Chassis car?

How could I add a boost effect to a vehicle using A-Chassis? I have a setup, all I need is how to apply the actual boost so they go faster. Is there a value I could somehow edit for the speed, or do I need to add a linear velocity, or what?

I tried adding a linear velocity, and it just freezes the car.
EDIT: I just looked through the drive script for A-Chassis, and it moves by using motors on the wheels. When I added the linear velocity, I bet it overrides the wheel motion. I’m not sure how I could add a force to the whole car at once for the boost, though.