This bold new "BLACK OUT" Power Brake Conversion for the 1967-72 Chevy and GMC trucks consists of a 9" Black Booster and Black Wilwood Master Cylinder and Wilwood adjustable proportioning valve. Performance Online introduced this item first over 6 months ago and received a huge response. This kit contains a powder coated booster, Black Wilwood Hi performance master cylinder, black adjustable Wilwood prop valve and black powder coated brackets to add a nice professional detailed look to your classic. Improves stopping and driver performance tremendously! Also work perfect for trucks with the ever popular LS conversion.