Master Cylinder 1in Bore 1/2in/9/16in Ports Cast

The Master Cylinder 1in Bore 1/2in/9/16in Ports Cast from ALLSTAR PERFORMANCE is a heavy-duty hydraulic brake master cylinder engineered for serious automotive and motorsports applications where reliable pressure delivery is non-negotiable. This cast unit delivers consistent hydraulic force to brake systems in performance vehicles, race cars, and custom builds where OEM components fall short of the demands placed on them. Whether you're building a dedicated track platform or upgrading a street-legal performance machine, this master cylinder provides the foundation for a responsive, modulated braking system.

Featuring a 1-inch bore diameter with dual port configurations—1/2-inch and 9/16-inch outlets—this master cylinder accommodates a range of brake line diameters and system architectures without compromise. The cast iron construction provides superior heat dissipation under sustained braking loads, critical for track use where fade resistance separates reliable setups from failures. The dual-port design allows for independent circuit isolation and system flexibility, enabling custom brake balance adjustments and proportioning valve integration. This configuration is particularly valuable for vehicles running separate front and rear hydraulic circuits or those requiring progressive pressure management.

Professionals in circle-track racing, drag racing, and high-performance street applications depend on ALLSTAR PERFORMANCE components for their engineering integrity and proven durability. Installation requires proper brake system bleeding, line routing to prevent kinking, and valve tuning to match your specific brake pad compound and vehicle weight distribution. Verify bore size compatibility with your existing proportioning valves, brake lines, and calipers before ordering to ensure seamless integration into your hydraulic layout. This master cylinder suits enthusiasts and shops seeking laboratory-grade reliability without OEM factory limitations.