Wilwood High Volume Tandem Master Cylinder - 1 1/8in Bore Black

If you're upgrading your braking system and looking to improve pedal feel and stopping power, especially with power assist, a high-volume master cylinder like this one from Wilwood is a solid choice. This particular unit features a 1 1/8 inch bore, which is well-suited for power brake applications, whether you're using vacuum assist or a hydraulic assist system. It's built to fit common domestic car and truck mounting flanges from the mid-1960s to today, measuring between 3.22 and 3.40 inches.

Wilwood machines these master cylinders from high-pressure die castings, resulting in a strong yet lightweight component that weighs only about 3 pounds. That's a significant weight savings, around 75% less, compared to traditional cast iron master cylinders. The design includes fluid outlet ports on both sides, offering flexibility during installation. It has a set stroke of 1.10 inches and a 2:1 volume ratio between the primary and secondary chambers, ensuring consistent fluid delivery to your calipers.

For a complete brake system upgrade, Wilwood also offers a combination proportioning valve kit that includes brackets and stainless steel lines specifically designed to work with this master cylinder. You can find these kits under part numbers 260-13190 or 220-13189.