Wilwood High-Volume Aluminum Master Cylinders represent the latest refinements in brake pressure actuation and fluid control. Each master cylinder is high pressure die-cast from high-grade aluminum, fully machined, and assembled with exclusive features only available from Wilwood. Wilwood High-Volume aluminum master cylinders have the highest fluid capacity of any integral reservoir design. With a total capacity of 8.2 ounces, there is at least 26% more fluid than most competitive brands. More fluid volume means cooler temperatures and additional insurance for extreme conditions where high pad wear can compromise fluid levels during long events.