Raybestos MC390807 Brake Master Cylinder

Reliable Brake Master Cylinder for Acura and Honda Vehicles

The Raybestos Element3; New Brake Master Cylinder MC390807 is engineered to restore precise brake hydraulics for Acura Civic and Honda Civic EL models. Designed with durable aluminum construction and exact fitment specifications, this master cylinder ensures consistent braking performance.

• Constructed from lightweight, corrosion-resistant aluminum
• Two mounting holes with 0.362-inch diameter for secure installation
• 0.875-inch bore size optimized for brake fluid pressure control
• Primary and secondary port threads sized M10x1 for compatibility with brake lines
• Compatible with Acura Civic and Honda Civic EL models

Product Line: Raybestos Element3; New

The Element3; New line from Raybestos focuses on delivering reliable brake hydraulics components with modern materials and precise engineering. This brake master cylinder is part of that line, offering improved durability and fitment accuracy for specific vehicle applications such as the Acura Civic and Honda Civic EL.

Detailed Product Description

This brake master cylinder (part number MC390807) features an aluminum body that resists corrosion and reduces weight compared to traditional cast iron units. It includes two mounting holes with a diameter of 0.362 inches, ensuring a secure and stable attachment to the vehicle’s brake system. The 0.875-inch bore size is designed to provide the correct hydraulic pressure for effective braking response. Both the primary and secondary ports have M10x1 thread sizes, compatible with standard brake line fittings for Acura and Honda models.

Common Applications and Issues Addressed

• Restores brake fluid pressure in Acura Civic and Honda Civic EL brake systems
• Replaces worn or leaking master cylinders causing brake pedal sponginess
• Fixes brake fluid leaks from damaged or corroded master cylinders
• Improves brake system responsiveness and safety
• Addresses master cylinder failure symptoms such as poor braking performance

Installation Notes and Tips

• Ensure compatibility with Acura Civic or Honda Civic EL before installation
• Bleed the brake system thoroughly after installation to remove air
• Use proper torque specifications for mounting bolts with 0.362-inch diameter holes
• Inspect brake lines for wear or damage during replacement
• Follow manufacturer guidelines for brake fluid type and maintenance

Quality Assurance and Warranty

Raybestos manufactures the MC390807 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction provides corrosion resistance and durability under normal operating conditions. This part is backed by Raybestos quality assurance protocols, ensuring reliable performance for Acura Civic and Honda Civic EL vehicles. Warranty details are provided by Raybestos and should be confirmed at the time of purchase.