Wilwood 260-6765 High-Volume Master Cylinder 7/8" Bore Universal

Vehicle Fitment

• Universal - suitable for custom and performance brake systems requiring a high-volume master cylinder

Features

• High-volume aluminum master cylinder with 7/8" (0.875") bore diameter
• High-pressure die-cast aluminum body for lightweight strength
• Integral reservoir provides 8.2 oz total fluid capacity for extended braking events
• 1-7/16" piston travel offers extra margin for systems with large piston calipers
• Heavy-duty internal springs ensure fast piston retraction and positive release
• Formed steel lid with bellows-type gasket helps seal fluid and resist moisture
• Flange or side mount compatible with common master cylinder mounting dimensions
• 1/8-27 NPT outlet port for standard brake line connections

Specifications

• Part Number: 260-6765 (Wilwood High-Volume Master Cylinder)
• Bore Size: 7/8" (0.875")
• Material: Die-cast aluminum body
• Reservoir: Integral aluminum
• Total Fluid Capacity: ~8.2 oz (integral reservoir)
• Stroke Length: ~1.43" (1-7/16")
• Outlet Port: 1x 1/8-27 NPT
• Mounting: Flange or side mounting compatible
• Pushrod Included: Yes

Included Components

• 1x High-volume master cylinder (Wilwood 260-6765)

Product Description

The Wilwood 260-6765 high-volume master cylinder is a performance-oriented hydraulic component designed for custom brake systems where extra fluid capacity and pressure are needed - such as larger caliper setups on street rods, race cars, and custom builds. With a 7/8" bore and integral reservoir holding approximately 8.2 oz of brake fluid, this master cylinder provides additional fluid volume compared to standard units, helping deliver more consistent performance during prolonged braking or demanding driving conditions.

Constructed from high-pressure die-cast aluminum with a formed steel lid and bellows-type gasket to keep fluid sealed and moisture out, the unit includes heavy-duty internal springs for fast piston retraction and a long 1-7/16" stroke to accommodate larger brake systems. Its common flange or side-mount dimensions and 1/8-27 NPT outlet port make it compatible with a wide variety of brake line fittings, making this master cylinder a versatile choice for performance brake upgrades where space and fluid capacity are considerations.