Our Black Out power brake conversion for the 1957-64 Ford F100 trucks consists of a 9" Black Booster and Black POL or Wilwood master cylinder and Black Out adjustable proportioning valve. Performance Online introduced this in 2013 and received a huge response. This kit contains a powder coated booster, Black POL or Wilwood high performance master cylinder, black adjustable proportioning valve and black powder coated brackets to add a nice professional detailed look to your classic. Improves stopping distances and driver performance tremendously.