OE Quality
60-Day Returns

Raybestos MC391149 Brake Master Cylinder
Overview of Raybestos MC391149 Brake Master Cylinder
The Raybestos Element3; New brake master cylinder MC391149 is engineered for reliable brake hydraulics performance in Mazda RX-8 vehicles. Designed with precision, this aluminum master cylinder ensures consistent braking pressure and durability for your RX-8.
- Compatible with Mazda RX-8 models
- Constructed from durable aluminum material
- Two mounting holes with 0.343-inch diameter for secure installation
- 0.875-inch bore size for optimal hydraulic performance
- Two ports with M12x1 thread size for primary and secondary connections
Detailed Product Features and Specifications
The Raybestos MC391149 brake master cylinder features a robust aluminum construction that offers corrosion resistance and long service life. It includes two mounting holes, each with a diameter of 0.343 inches, ensuring a secure fitment on the brake system assembly. The 0.875-inch bore size is designed to provide precise hydraulic pressure control, essential for effective braking response. Both the primary and secondary ports use M12x1 thread sizes, facilitating compatibility with standard brake line fittings. This part is specifically designed for the Mazda RX-8, ensuring proper fit and function within the vehicle's brake hydraulics system.
About the Raybestos Element3; New Product Line
The Element3; New line by Raybestos focuses on delivering reliable brake components that meet or exceed OEM specifications. This product line emphasizes quality materials and precise engineering, making it suitable for critical brake system parts like the MC391149 master cylinder. The Element3; New series is intended to provide consistent performance and durability for vehicles such as the Mazda RX-8, supporting safe and effective braking operation.
Common Applications and Problem Solving
- Replacement for worn or leaking brake master cylinders in Mazda RX-8
- Restores proper hydraulic pressure for improved brake pedal feel
- Addresses brake fluid leaks caused by damaged ports or seals
- Resolves inconsistent braking due to bore wear or corrosion
- Supports brake system rebuilds requiring OEM-quality master cylinder parts
Installation Notes and Tips
When installing the Raybestos MC391149 brake master cylinder, ensure the mounting holes align correctly with the vehicle’s brake booster or firewall. Use the specified 0.343-inch diameter mounting holes for secure attachment. Verify that the M12x1 threaded ports match the brake line fittings to prevent leaks. Bleed the brake system thoroughly after installation to remove air and restore proper hydraulic pressure. It is recommended to inspect related brake components during installation for overall system integrity.
Quality Assurance and Warranty
Raybestos manufactures the MC391149 brake master cylinder to meet stringent quality standards, using durable aluminum material and precise machining. The Element3; New product line is designed to provide consistent performance and reliability. While specific warranty details are not provided here, Raybestos typically offers coverage against defects in materials and workmanship. Consult product documentation or authorized sources for exact warranty terms.
| Brand | Raybestos |
|---|---|
| Part Number | MC391149 |
| Position | Element3; New, N/A |
| Bore Size | 0.875 |
| Master Cylinder Material | Aluminum |
| Mounting Hole Diameter | 0.343 |
| Mounting Hole Quantity | 2 |
| Number of Ports | 2 |
| Primary Port Thread A | M12x1 |
| Secondary Port Thread A | M12x1 |
This part fits 8 vehicles. Search below:
| Year | Make | Model | Transmission | Position | Notes |
|---|---|---|---|---|---|
| 2011 | Mazda | RX-8 | Manual | N/A | with Dynamic Stability Control; Element3; New |
| 2010 | Mazda | RX-8 | Manual | N/A | with Dynamic Stability Control; Element3; New |
| 2009 | Mazda | RX-8 | Manual | N/A | with Dynamic Stability Control; Element3; New |
| 2008 | Mazda | RX-8 | Manual | N/A | w/ Sport Suspension; with Dynamic Stability Control; Element3; New |
| 2007 | Mazda | RX-8 | Manual | N/A | w/ Sport Suspension; with Dynamic Stability Control; Element3; New |
| 2006 | Mazda | RX-8 | Manual | N/A | w/ Sport Suspension; with Dynamic Stability Control; Element3; New |
| 2005 | Mazda | RX-8 | Manual | N/A | with Dynamic Stability Control; From 06/2005; Element3; New |
| 2004 | Mazda | RX-8 | Manual | N/A | with Dynamic Stability Control; From 06/2005; Element3; New |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.