This Kit includes a high quality 7 dual booster and master cylinder combo. The dual booster has 27% more stopping power over a single booster for improved braking. This setup is ready for all disc/drum applications. The master cylinder is Corvette style master cylinder with a 1 bore.You're getting the complete kit here for a fraction of the cost! Residual valves are one-way check valves that prevent bleed back of brake fluid (bleed back can often result in loss of brake pressure). Also included in this kit is a 2 pound residual valve for the front discs and a 10 pound residual valve for the rear drum brakes. These residuals prevent loss of brake pressure. They run in-line and act as a one way check valve and prevent fluid from bleeding back to the master cylinder. These valves are a MUST when mounting your master cylinder under the floor. This is a must for any disc brake conversion or power brake upgrade. + PV2 Side Bracket Kit + Blue Valve + Red Valve. Please wait for us to send you a combined invoice before paying. We are Gearhead Enterprises - a national street rod parts supply company. Parts are added to our store weekly so check often for the latest deals! Plus, we have access to thousands of parts that are not listed. We get hundreds of emails daily so at times it may take us up to 72 hours to respond to your emails. The item "1937-1948 Chevy Car Disc Drum Power Brake Booster Frame Mount Pedal Assembly Kit" is in sale since Thursday, December 4, 2014. This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Brakes". The seller is "rodpartsdealer" and is located in Hudson, Iowa. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Colombia, Panama, Jamaica.