Wilwood High Volume Brake Master Cylinder (7/8" Bore)
WIL260-6765
The Wilwood High Volume Aluminum Master Cylinder (7/8" Bore) is engineered for high demand brake systems that require maximum fluid capacity, extended piston travel, and fast, consistent retraction. Built from high pressure die-cast, high grade aluminum, this master cylinder delivers superior heat dissipation, tight bore tolerances, and long seal life.
With an 8.2 oz integral reservoir, it provides at least 26% more fluid volume than most competing integral reservoir designs, which helps keep fluid temperatures lower and maintaining reserve during long events or high pad wear conditions. A 1-7/16" (1.43") piston stroke offers extra margin for high displacement systems, while heavy duty internal return springs ensure fast piston retraction and improved pedal feel. Formed steel lids with bellows-style gaskets keep moisture out and pressure balanced.
Includes:
- (1) Wilwood High Volume Aluminum Master Cylinder
- Integral reservoir with internal slosh control
- Formed steel lid with bellows gasket
Specifications
- Manufacturer: Wilwood
- Master Cylinder Type: Single Outlet
- Bore Size: 7/8"
- Piston Area: 0.600 in²
- Stroke: 1.43"
- Volume: 0.85 cu in
- Material: Aluminum body / Steel components
- Finish: Bare
- Outlets: 1"
- Outlet Thread Size: 1/8"-27 NPT
- Reservoir Type: Integral
- Capacity: 8.2 oz
- Volume: 14.80 cu in
Fitment
- Common dimensions for flange or side mounting
- Ideal for performance, racing, and off-road brake systems
- Recommended for setups using large piston calipers
- Compatible with standard 1/8"-27 NPT brake fittings
- Verify bore size selection based on pedal ratio, caliper piston area, and desired pedal effort.
Tech Insight
Wilwood’s high pressure die casting allows the bore to be finished without a stainless sleeve, improving heat dissipation and seal life compared to sand-cast designs. The internal slosh baffle maintains a constant fluid supply during hard braking, acceleration, and cornering, while heavy duty springs speed fluid recovery and simplify bleeding—critical advantages for endurance, off-road, and competition use.