Product Info: Part: Brake Master Cylinder Master Cylinder Material: AluminumBleeder Hoses Included: YesBrake Booster Included: NoMaster Cylinder Cap Included: NoPushrod Included: NoBore Diameter: 0.937 inches (23.7998 millimeters)Primary Outlet Thread: 0.472 inches (11.9 millimeters)Secondary Outlet Thread: 0.472 inches (11.9 millimeters)Master Cylinder Bore Size: 0.937 inchesPort Quantity: 2Mounting Hole Count: 2Programming Required: NoProduct Interchange: Manufacturer Part Number: 18M391390Product Features: Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyleMade from high-quality materials for ultimate durabilityManufactured to meet or.