No it can remain hooked up it works on demand thats why there is a pressure switch.. IE a lot of drag guys use them because of large cams and little to no vacuum at idle. So when you hit the brakes you drain the vacuum from the booster and the motor can't make up the vacuum so there is no brakes the pump kicks on and makes up for it so you dint loose brakes. It hooks to the booster not the hydraulic lines.


(at the moment) I'm currently trying to part it out, but if I get this job with the county I'm looking at, it won't be for sale