Centric 131.66020 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet and GMC Trucks

The Centric C-TEK Standard Brake Master Cylinder 131.66020 is engineered to restore precise brake hydraulics for Chevrolet C1500 and GMC K1500 models. Designed with durable aluminum and a plastic reservoir, this master cylinder ensures consistent braking performance and fluid management.

• Durable aluminum master cylinder body for long-lasting use
• Includes a removable single plastic reservoir for easy maintenance
• Comes with a master cylinder cap for secure fluid containment
• Two mounting holes for secure installation
• Primary and secondary outlet thread sizes: 1/2"-20 and 9/16"-18 inverted flare
• Stepped bore design with primary bore diameter of 1.417 inches and secondary bore diameter of 0.937 inches
• Compatible with Chevrolet C1500 and GMC K1500 brake hydraulic systems

About the C-TEK Standard Brake Master Cylinder Line

The C-TEK Standard Brake Master Cylinder line by Centric focuses on delivering reliable, OEM-quality replacement parts for brake hydraulics. This product line emphasizes precise fitment and durable materials, such as aluminum master cylinders paired with plastic reservoirs, to meet the demands of standard brake system repairs. The 131.66020 part is a representative component designed to maintain proper brake fluid pressure and flow in compatible Chevrolet and GMC trucks.

Product Details and Specifications

This brake master cylinder features a stepped bore design with a primary bore diameter of 1.417 inches and a secondary bore diameter of 0.937 inches, optimizing hydraulic pressure distribution. The unit includes a removable single reservoir made of plastic, facilitating fluid inspection and replacement. The master cylinder cap is included to ensure a sealed system, while mounting hardware, brake booster, push rod, bleeder hoses, and mounting bracket are not included. The part has two ports with inverted flare types for both primary and secondary outlets, sized 1/2"-20 and 9/16"-18 threads per inch respectively, matching OEM specifications for Chevrolet C1500 and GMC K1500 models.

Common Applications and Problem Resolution

• Restores brake fluid pressure in Chevrolet C1500 and GMC K1500 trucks
• Replaces worn or leaking master cylinders causing brake pedal sponginess
• Solves brake fluid reservoir leaks with included removable reservoir
• Addresses inconsistent braking due to damaged or corroded master cylinder bores
• Improves brake system reliability after component failure or wear

Installation Notes and Tips

• Ensure compatibility with Chevrolet C1500 and GMC K1500 models before installation
• Use proper brake fluid and bleed the brake system thoroughly after installation
• Mounting hardware is not included; retain original hardware or source separately
• Check for proper thread engagement on primary and secondary outlet fittings (1/2"-20 and 9/16"-18 inverted flare)
• Inspect brake booster and push rod separately as they are not included with this part

Quality Assurance and Warranty

Centric’s C-TEK Standard Brake Master Cylinder 131.66020 is manufactured to meet or exceed OEM standards for brake hydraulics. The aluminum construction and precise bore dimensions ensure durability and consistent performance. While specific warranty details are not provided here, Centric typically offers limited warranties on their brake components to cover defects in materials and workmanship.