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Brake line install using tii booster


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For those of you who convert to the tii brake booster I thought it might be helpful to post info on the length of hard brake lines required. Parts numbers for these lines have been superceded numerous times. I suppose you can bend the old lines to fit, but since the booster moves everything about 2-1/2 inches forward, I decided to install all new lines. Included are some photos of the installation corresponding to the lengths listed in the chart. Circuit 1 refers to the front portals of the master cylinder and circuit 2 the rear. The BMW factory lines are easy to bend (using the old lines as a template). I used a tubing bender (94571) from Harbor Freight Tools. I also shortened one of the lines by using a metric bubble (ISO) flaring tool. This was one of the more difficult tasks of the install since the plastic coating on the line kept slipping in the tool.

You could also use the chart for the regular booster by subtracting 63mm from the listed lengths. This install was on a '71 2002 for reference. Hope this helps.

2002 Brakeline chart.pdf





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