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Operation of Roadmaster InvisiBrake Supplemental Braking System  

Question:

Hi, I have just had the Invisibrake system fitted to our new 2021 Subaru Crosstrek. I am trying to get my head round how the air cylinder can work if the car is not running and supplying vacuum air. My only thought is that the cable to the brake pedal is operated by an electric servo motor.

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Expert Reply:

The Roadmaster InvisiBrake Supplemental Braking System, # RM-8700, has a controller that is vacuum-operated. It will send pressure to the air cylinder and the air cylinder will apply pressure to the brake system by pulling on the attached cable.

Please note the attached product review and installation video.

expert reply by:
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Michael R

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