Aluminum Tandem Chamber Master cylinder. *Note that if adding booster, adapter is required* Installation Instructions Great upgrade for your Mopar. Can be used with our four wheel disc kits or disc drum applications. This master cylinder is ideal for manual or power brakes and can be attached to the stock booster or firewall by using our adapter MFR#161190 available below. If using manual brakes you'll need the pushrod below as well. Step up the bore diameter to 1.125 only if using 6-piston brakes or 4-piston with power booster. 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. A choice of 7/8", 1" or 1-1/8" bore sizes provides the necessary options to match the volume and pressure requirements of nearly any application. And for those wanting a show car look, a bright finish, media burnished version is available and guaranteed to catch the eye of the most discriminating enthusiasts.