Raybestos MC391315 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet Cobalt and Pontiac G5

The Raybestos Element3; New Brake Master Cylinder MC391315 is engineered to restore precise brake hydraulics for Chevrolet Cobalt and Pontiac G5 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 0.374-inch diameter for secure installation
• 0.875-inch bore size optimized for proper hydraulic pressure
• Two ports with M12x1 thread size for primary and secondary brake lines
• Compatible with Chevrolet Cobalt and Pontiac G5 brake systems

Detailed Specifications and Product Line Information

This brake master cylinder features a 0.875-inch bore size, which is critical for maintaining the correct hydraulic pressure in the brake system. The two mounting holes, each with a diameter of 0.374 inches, provide a stable and precise fit to the vehicle’s firewall or mounting bracket. Both the primary and secondary ports use M12x1 threads, ensuring compatibility with standard brake line fittings on the Chevrolet Cobalt and Pontiac G5.

The Element3; New product line by Raybestos focuses on delivering reliable brake hydraulics components that meet or exceed OEM standards. This line emphasizes quality materials and precise engineering, making the MC391315 master cylinder a suitable replacement part for maintaining factory brake system integrity.

Applications and Common Brake Issues Addressed

• Restores proper brake pedal feel and responsiveness
• Eliminates brake fluid leaks caused by worn or damaged master cylinders
• Prevents brake system failure due to internal seal wear
• Corrects inconsistent hydraulic pressure affecting braking performance
• Replaces corroded or damaged aluminum master cylinders in Chevrolet Cobalt and Pontiac G5

Installation Notes and Tips

When installing the Raybestos MC391315 brake master cylinder, ensure the mounting holes align precisely with the vehicle’s firewall or bracket. Use the correct torque specifications for mounting bolts to avoid distortion. Bleed the brake system thoroughly after installation to remove air and ensure optimal hydraulic function. Verify that the M12x1 threaded ports are properly connected to the brake lines to prevent leaks.

Quality Assurance and Warranty

Raybestos Element3; New brake master cylinders are manufactured with high-quality aluminum and undergo rigorous testing to meet industry standards. This part number MC391315 is designed to provide reliable service life and consistent braking performance. Warranty coverage details should be confirmed with the product documentation or supplier.