The Wilwood Tandem Chamber Master Cylinder was designed for hot rods, street rods, custom builds, classics, and resto-mods, this master cylinder is a favorite on award winning show cars because it works as great as it looks.

A lightweight, high pressure die cast aluminum body houses a generous integral dual reservoir and a 1.10 piston stroke that provides ample fluid volume for larger multi-piston calipers. The slotted mounting flange makes installation straightforward on many OE bolt patterns, including Chrysler, Corvette, GM, and Ford Mustang. Dual outlet ports on both sides of the bore simplify plumbing (plugs included).

This 1-1/8" bore version is optimized for power brake systems (vacuum or hydraulic assist). It features a 2:1 primary to secondary chamber volume ratio for balanced front/rear braking and weighs just 3 lbsup to 75% lighter than cast-iron OE masters.

Includes:

• (1) Wilwood Tandem Chamber Master Cylinder
• Integral dual reservoir
• Dual-sided outlet ports with plugs
• Pushrod not included for 1-1/8" bore. Proportioning valve kits sold separately.

Specifications

• Manufacturer: Wilwood
• Master Cylinder Type: Tandem Outlet
• Bore Size: 1-1/8 in
• Piston Area: 0.970 in
• Stroke: 1.10 in
• Chamber Volume Ratio: 2:1 (Primary/Secondary)
• Material: Aluminum
• Finish: Bare
• Weight: ~3 lbs
• Outlets: (2)

Fitment

• Designed for power brake applications (vacuum or hydraulic assist)
• Mount flange spacing: 3.22 3.40 (common mid-1960spresent domestic vehicles)
• Slotted flange fits many Chrysler, GM, Corvette, and Ford Mustang bolt patterns
• Front and rear outlet ports on both sides for flexible plumbing
• For disc/drum systems, use a 10 lb residual valve on the drum circuit.

Tech Insight

The Tandem Chamber design delivers refined pressure control in a compact, lightweight package. The long 1.10 stroke ensures sufficient volume for modern multi-piston calipers, while the dual outlets and slotted flange reduce installation complexity on custom and retrofit builds. Pair this master with Wilwoods combination proportioning valve retrofit kits (PN 260-13190 or 220-13189) for clean plumbing and proper bias control.

Reservoir Capacity

Front / Rear: 8.0 oz / 4.8 oz

Volume: 14.4 cu in / 8.7 cu in