Our Proflow brake boosters are the perfect addition to your street rod or custom application. The boosters are available in multiple diameters, in universal or direct fit single or dual-diaphragm designs to best fit your application. Choose between the brake booster only and the brake booster and brake pedal rod extension kit, which makes installation even easier. Available in zinc, black, chrome, and some in stainless steel. Some even have the original Delco Logo for your restoration project.