Wilwood 260-15540-P Compact Tandem Master Cylinder with Pushrod 1.00" Bore Ball Burnished

The Wilwood 260-15540-P Compact Tandem Master Cylinder is a high-performance, lightweight brake master cylinder engineered for manual brake applications. Machined from high-pressure die cast aluminum, this unit features a 1.00" bore and a polished ball burnished finish, and includes a 3/8-24 threaded pushrod ready for direct installation.

Key Features:

• 1.00" bore with a 1.10" stroke for precise pedal feel and braking response
• Tandem dual-chamber design with a 2:1 volume ratio between primary and secondary chambers for split-circuit safety
• Fluid outlet ports on both sides of the bore for flexible plumbing configurations
• Mounting flange compatibility from 3.22" to 3.40", fitting most domestic cars and trucks from the mid-1960s to present
• Die cast aluminum construction — weighs only 3 lbs, a 75% weight savings over traditional cast iron OE master cylinders
• 6.55" overall body length — one of the shortest integral-reservoir master cylinders available, ideal for tight engine bay fitment
• Ball burnished (polished) finish for a clean, show-quality appearance
• Includes 3/8-24 pushrod for manual (non-power booster) brake pedal applications

The compact tandem design maintains full isolation between front and rear fluid circuits, preserving a critical safety feature: in the event of a circuit failure, emergency braking pressure can still be built in the remaining circuit. The 260-15540-P is also compatible with Wilwood's combination proportioning valve retrofit kits — PN 260-14248 (left-hand outlets) or PN 260-15667 (right-hand outlets) — which include brackets and stainless steel lines for a complete system upgrade.