This new Black Out power brake conversion for the 1958-65 Belair, Biscayne and Impala consists of a 9″ Black Booster and Black POL or Wilwood Master Cylinder and Black Outadjustable proprtiponing valve. Performance Online introduced this item first over 6 months ago and received a huge response. This kit contains a powder coated booster, Black POL or Wilwood High performance master cylinder, black adjustable prop valve and black powder coated brackets to add a nice professional detailed look to your classic. Improves stopping and driver performance tremendously.