Raybestos MC39859 Professional Grade Brake Master Cylinder

The Raybestos MC39859 Professional Grade Brake Master Cylinder delivers reliable hydraulic pressure for safe, consistent braking performance. Engineered to match OE fit, form, and function, this master cylinder is precision-manufactured to original equipment specifications for a direct replacement solution.

Key Features:

• 100% end-of-line pressure tested to ensure leak-free performance and reliability
• New construction with all-new castings, pistons, and return springs for maximum durability
• Arrives complete and ready to bench bleed and install with no assembly required
• Bore size and finish match OE specifications to prevent fluid bypass and maintain proper hydraulic pressure
• EPDM rubber components meet SAE specifications and are compatible with DOT 3 and DOT 4 brake fluids
• Aluminum construction for corrosion resistance and heat dissipation
• Geometrically toleranced body and reservoir ensure proper fit and leak-free operation

This professional-grade master cylinder is designed for automotive technicians and DIY mechanics who demand OE-quality replacement parts. The Raybestos Element3 line is backed by rigorous testing to meet SAE J1153 and J1154 standards for reliable, long-lasting performance.