HFM High Volume 27mm Brake Master Cylinder Upgrade for Toyota GT86 ZN6 GR86 ZN8 & Subaru BRZ ZC6 ZD8 - BMU86

Stop Sooner: The 27mm High Volume Brake Master Cylinder Upgrade

The Toyota 86 and Subaru BRZ are celebrated for their handling, but the stock braking system often leaves performance drivers wanting a firmer, more responsive pedal. The HFM.Parts High Volume Master Cylinder directly addresses this by significantly increasing the bore size from the factory 25.4mm to a high-performance 27mm.

This modification allows a higher volume of fluid to be circulated with less pedal effort. The result is a substantial reduction in pedal travel, the elimination of that "mushy" feeling, and a dramatically more responsive and confident braking feel - perfect for track days or spirited driving.
Key Advantages & Performance Features
Engineered for the ZN6, GR86, ZC6, and ZD8 chassis,WILL not fit GT86 LHD version this upgrade provides:

• Massive 27mm Bore: Increases fluid displacement over the OEM 25.4mm bore for a much firmer pedal and reduced travel distance.
• Improved Stopping Power: Recommended for both stock and multi-piston big brake caliper upgrades.
• Swappable Fluid Sensor: Designed for seamless installation on both LHD and RHD models; simply swap the fluid sensor connector to the opposite side.
• Corrosion-Proof Geomet® Coating: Features a durable, environmentally friendly finish for heat protection and a clean, dark look in the engine bay.

Technical Specifications Snapshot

• Piston Bore: 27mm (Upgraded from 25.4mm Stock)
• Design: High Volume Brake Master Cylinder
• Coating: Geomet® Finish
• Fitment: Universal LHD/RHD (Sensor swappable)