Wilwood High Volume Tandem Master Cylinder - 1in Bore Ball Burnished

This is the Wilwood High Volume Tandem Master Cylinder with a 1-inch bore, finished in ball burnished aluminum. It's designed to replace older, heavier cast iron master cylinders on most domestic cars and trucks from the mid-1960s to the present day. The tandem design means it has two separate fluid chambers, which is a crucial safety feature for your braking system.

Wilwood machines these from high-pressure die castings, resulting in a unit that weighs only 3 pounds – that's about a 75% weight savings compared to typical cast iron master cylinders. This 1-inch bore size is versatile and works well for both manual brake setups and those using power assist systems. It features fluid outlet ports on both sides, giving you flexibility during installation, and has a set stroke of 1.10 inches with a 2:1 volume ratio between the primary and secondary chambers.

If you're looking to upgrade your braking system, this master cylinder is a solid choice. Wilwood also offers a combination proportioning valve kit (PN 260-13190 or 220-13189) that includes brackets and stainless lines specifically designed to work with this master cylinder.