NEW CHROME POWER BRAKE BOOSTER & POLISHED WILWOOD MASTER CYLINDER SET WITH ADJUSTABLE PROPORTIONING VALVE FOR 1955 - 1964 CHEVY, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964 150, 210, BEL AIR, NOMAD, SEDAN DELIVERY, DEL RAY, BISCAYNE, BROOKWOOD, EL CAMINO, IMPALA Brand New Chrome 8" Dual Diaphragm Power Brake Booster and Polished Aluminum Tandem Chamber Master Cylinder Set for the applications listed below. | * Includes: | * Southwest Speed Chrome Power Brake Booster (# 300-7963) * 8" Dual diaphragm booster * Deep chrome finish gives it that show-car look that is guaranteed to catch the eye of the most discriminating enthusiasts | * Southwest Speed Booster Mounting Bracket Set (# 300-7910) * Brackets to mount the booster directly to the firewall on the applications listed below | * Wilwood Polished Master Cylinder & Proportioning Valve Set (# 261-13270-P) ** Polished Tandem Chamber Master Cylinder * 1 1/8" Bore cylinder | * Adjustable Combination Proportioning Valve | * Stainless Steel Fluid Tubes * Precision bent with preinstalled stainless tube nuts for a simple bolt-on installation | * Mounting Bracket * Black e-coating will give years of durable, rust-free performance | * Stainless Steel Button Head Bolts Wilwood Aluminum Tandem Chamber Master Cylinder Details: | * Wilwood tandem chamber master cylinders represent the latest refinements in brake pressure actuation and fluid control. The exclusive Wilwood features incorporated in this innovative and unique new design make it the perfect choice for a wide range of custom manual or power brake applications. | * High-pressure die casting of a premium alloy produces a high-capacity body that is lightweight, looks great, and has the durability for competition. A black anodized, machined billet lid captures a pressure balanced bellows gasket with 100% sealing against moisture invasion or fluid leakage. The mounting flange is slotted to accommodate installation on bolt centers between 3.22" and 3.40". That makes it a simple bolt-on to many OE mounts including the popular Chrysler, Corvette, GM, and Ford Mustang master cylinder bolt patterns. | * The body also features two through-hole mounts on 6.40" centers for side mounting to frame members or other secure elements of the chassis. Each master cylinder is configured with full separation between the front and rear reservoir chambers and fluid outlets. There is pressure access on both sides of the piston bore for right or left hand plumbing based on mount location. A total piston stroke of 1.10" is distributed at a 2:1 volume ratio between the primary and secondary chambers. | * Diagram shown in the images Wilwood Combination Proportioning Valve Details: | * Simplifies mounting, fluid circuit plumbing, brake light wiring, and brake bias adjustments on modified, custom built, or competition vehicles equipped with brake system upgrades | * Maintains full separation between the front and rear fluid circuits when used with tandem outlet or dual mount master cylinder assemblies | * Bias proportioning adjustment is provided in the rear fluid circuit | * The front circuit has a single inlet and two outlets for optional line routing | * A fluid port with a pressure switch responds instantly to pressure in the front fluid circuit for brake light activation. A wiring pigtail with a protective boot is included with the switch | * Diagram shown in the images Installation Instructions can be found in the product description below. Fits: | * Chevrolet: | * 1955 - 1957 Chevy 150 | * 1955 - 1957 Chevy 210 | * 1955 - 1957 Chevy Bel Air | * 1955 - 1957 Chevy Nomad | * 1955 - 1957 Chevy Sedan Delivery | * 1957 Chevy Del Ray | * 1959 - 1964 Chevy Bel Air | * 1959 - 1964 Chevy Biscayne | * 1959 - 1961 Chevy Brookwood | * 1959 - 1960 Chevy El Camino | * 1959 - 1964 Chevy Impala