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Here, Sims is bleeding the brakes with the RFI method. He's injecting clean fluid into the caliper to push any air bubbles up and out the master cylinder reservoir. Also notice the flashlight mounted on top of the Injector. This is to help you see what you are working on in the event you have to bleed or flush the brakes in the pits at the racetrack. Most racers don't have to do this often, but if you are faced with the task, a light certainly will be helpful, as the Project G.R.E..E.N. guys found out.