Wilwood 260-8556-P 1-1/8" Polished Tandem Master Cylinder for Power Brake System

Vehicle Fitment

• Universal fitment for custom applications
• Compatible with most domestic cars and trucks from mid-1960s to present
• Designed for power brake systems with vacuum or hydraulic assist

Note: Not intended as a direct OEM replacement. Verify mounting flange dimensions and pushrod compatibility before installation.

Features

• 1-1/8" bore size suitable for power brake applications
• Polished aluminum finish for a show-quality appearance
• Lightweight die-cast aluminum body reduces weight by up to 75% compared to cast iron
• Integral reservoir with 8.0 oz (primary) and 4.8 oz (secondary) capacities
• Dual outlet ports on both sides for flexible plumbing options
• 1.10" stroke with a 2:1 volume ratio between primary and secondary chambers
• Compatible with Wilwood proportioning valve kits (sold separately)
• Mounting flange range: 3.22" to 3.40"

Specifications

• Part Number: 260-8556-P
• Bore Size: 1-1/8"
• Stroke: 1.10"
• Material: Aluminum
• Finish: Polished
• Reservoir Type: Integral
• Reservoir Capacity: 8.0 oz (primary), 4.8 oz (secondary)
• Outlet Ports: 2 (1/2"-20 UNF), with adapters for 3/8"-24 and 9/16"-18 inverted flare
• Weight: Approximately 3 lbs
• UPC: 889545068009

Included Components

• 1x Wilwood 260-8556-P Tandem Master Cylinder
• 2x 3/8"-24 inverted flare adapters
• 1x 9/16"-18 inverted flare adapter
• 1x 1/2"-20 inverted flare adapter
• 2x Hex head plugs for unused ports
• Aluminum crush washers
• Installation instructions

Product Description

The Wilwood 260-8556-P Tandem Master Cylinder is engineered for high-performance braking systems requiring a 1-1/8" bore size, making it ideal for power brake applications. Its polished aluminum finish offers a sleek, show-quality appearance, while the lightweight die-cast construction significantly reduces weight compared to traditional cast iron cylinders.

Featuring an integral reservoir with ample fluid capacity, this master cylinder provides reliable performance for various braking setups. Dual outlet ports on both sides allow for versatile plumbing configurations, accommodating a wide range of custom installations. The 1.10" stroke and 2:1 volume ratio between the primary and secondary chambers ensure consistent and efficient brake fluid delivery.

Designed to fit mounting flanges ranging from 3.22" to 3.40", the Wilwood 260-8556-P is compatible with most domestic vehicles from the mid-1960s onward. For optimal performance, it can be paired with Wilwood's proportioning valve kits (sold separately), enabling precise brake bias adjustments tailored to your specific application.