Centric 131.66011 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet, GMC, and Oldsmobile

The Centric C-TEK Standard Brake Master Cylinder 131.66011 is engineered to restore proper brake hydraulics in select Chevrolet, GMC, and Oldsmobile vehicles. Designed with durable cast iron and a plastic reservoir, this master cylinder ensures consistent brake fluid delivery for safe stopping performance.

• Durable cast iron master cylinder body for long-lasting strength
• Includes a removable single plastic reservoir for easy maintenance
• Comes with a master cylinder cap included for secure sealing
• 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 0.929 inches
• Compatible with Chevrolet Blazer, GMC Jimmy, Oldsmobile S15, and related models

About the C-TEK Standard Brake Master Cylinder Line

The C-TEK Standard Brake Master Cylinder line by Centric focuses on providing reliable, OE-quality replacement parts for brake hydraulics. This product line emphasizes precise fitment and durable materials, such as cast iron construction and plastic reservoirs, to meet the demands of daily driving. The 131.66011 model is part of this line, offering a balance of performance and value for vehicles requiring a standard brake master cylinder replacement.

Product Details and Specifications

This brake master cylinder features a cast iron body paired with a plastic reservoir that is removable for convenient servicing. It includes a master cylinder cap but does not come with mounting hardware, push rod, brake booster, bleeder hoses, or mounting bracket. The unit has two ports with inverted flare threads: a primary outlet thread size of 1/2"-20 and a secondary outlet thread size of 9/16"-18, both designed for secure brake line connections. The stepped bore design includes a primary bore diameter of 1.417 inches and a secondary bore diameter of 0.929 inches, ensuring proper hydraulic pressure distribution.

Compatible Vehicles and Common Applications

• Replacement for brake master cylinder issues in Chevrolet Blazer and S10 Blazer
• Suitable for GMC Jimmy, Bravada, and Sonoma models
• Fits Oldsmobile S15 and S15 Jimmy vehicles requiring brake hydraulic repairs
• Addresses brake fluid leaks and pressure loss in compatible trucks and SUVs
• Restores proper brake pedal feel and stopping power

Installation Notes and Tips

Installation requires removal of the old master cylinder and proper connection of brake lines to the inverted flare ports. Since mounting hardware and push rod are not included, reuse existing components or source separately. Bleeding the brake system after installation is necessary to remove air and ensure optimal brake performance. Verify compatibility with your specific vehicle model and year before installation.

Quality Assurance and Warranty

Centric's C-TEK Standard Brake Master Cylinder 131.66011 is manufactured to meet or exceed OEM specifications for fit and function. The cast iron construction and quality materials contribute to reliable brake system operation. Warranty details should be confirmed with the product documentation or manufacturer, as coverage may vary.