OE Quality
60-Day Returns

Raybestos 580503R Disc Brake Rotor - Front
Overview of Raybestos R-Line Disc Brake Rotor 580503R
The Raybestos R-Line Disc Brake Rotor 580503R is engineered for reliable braking performance on Chevrolet Cobalt and Pontiac G5 models. Designed as a vented, conventional rotor, it offers consistent heat dissipation and durability for everyday driving conditions.
- Vented disc brake rotor for improved cooling
- Overall height: 1.843 inches (46.8 mm)
- Outside diameter: 11.024 inches (280 mm)
- Mounting bolt hole quantity: 5 with 110 mm bolt circle diameter
- Center hole diameter: 2.587 inches (65.7 mm)
- Nominal thickness: 0.945 inches (24 mm)
- Discard thickness: 0.906 inches (23 mm)
- Conventional rotor type compatible with Chevrolet Cobalt and Pontiac G5
Raybestos R-Line Product Line Details
The R-Line by Raybestos focuses on providing dependable replacement brake components that meet or exceed OEM specifications. This product line emphasizes quality materials and precise manufacturing tolerances, ensuring that the 580503R disc brake rotor delivers consistent braking performance and longevity for compatible vehicles.
Technical Specifications and Features
This vented disc brake rotor features an overall height of 1.843 inches and an outside diameter of 11.024 inches, designed to fit the brake system requirements of Chevrolet Cobalt and Pontiac G5 models. The rotor includes five mounting bolt holes arranged on a 110 mm bolt circle diameter, with a center hole diameter of 2.587 inches, ensuring proper fitment and secure installation. The nominal thickness of 0.945 inches provides sufficient material for wear, while the discard thickness of 0.906 inches indicates the minimum safe thickness before replacement is necessary.
Common Applications and Problem Solving
- Replacement for worn or warped rotors causing brake pulsation
- Addressing reduced braking efficiency due to rotor thickness below discard limits
- Resolving noise issues related to uneven rotor surfaces
- Upgrading to vented rotors for improved heat dissipation in daily driving
- Ensuring proper fitment on Chevrolet Cobalt and Pontiac G5 brake assemblies
Installation Notes and Tips
When installing the Raybestos R-Line 580503R rotor, ensure the mounting surface is clean and free of rust or debris. Verify the rotor thickness before installation to confirm it meets nominal specifications. Use proper torque settings on the five mounting bolts arranged on the 110 mm bolt circle diameter. It is recommended to replace brake pads simultaneously to maintain optimal braking performance and rotor longevity.
Quality Assurance and Warranty
Raybestos R-Line rotors are manufactured to meet strict quality standards, ensuring consistent performance and durability. The 580503R rotor is produced with high-grade materials and precision engineering. While specific warranty details are not provided here, Raybestos typically offers coverage against defects in material and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.
| Brand | Raybestos |
|---|---|
| Part Number | 580503R |
| Position | R-Line, Front |
| Center Hole Diameter | 2.587 |
| Center Hole Diameter | 65.700 |
| Conventional Or Drum-In-Hat Type Rotor | Conventional |
| Discard Thickness | 0.906 |
| Discard Thickness | 23.000 |
| Mounting Bolt Hole Circle Diameter | 4.331 |
| Mounting Bolt Hole Circle Diameter | 110.000 |
| Mounting Bolt Hole Diameter | 4.331 |
| Mounting Bolt Hole Diameter | 110.000 |
| Mounting Bolt Hole Quantity | 5 |
| Nominal Thickness | 0.945 |
| Nominal Thickness | 24.000 |
| Outside Diameter | 11.024 |
| Outside Diameter | 280.000 |
| Overall Height | 1.843 |
| Overall Height | 46.800 |
| Solid Or Vented Type Rotor | Vented |
| Stud/Lug Hole Quantity | 5 |
This part fits 8 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2010 | Chevrolet | Cobalt | 2.2L | L4 | Front | Fits vehicles with 5-lug wheels.; R-Line |
| 2010 | Pontiac | G5 | Front | PONTIAC Brake Code JM4; Raybestos R-Line | ||
| 2009 | Chevrolet | Cobalt | 2.2L | L4 | Front | Fits vehicles with 5-lug wheels.; R-Line |
| 2009 | Pontiac | G5 | Front | Fits vehicles with 5-lug wheels.; R-Line | ||
| 2008 | Chevrolet | Cobalt | 2.2L | L4 | Front | Fits vehicles with 5-lug wheels.; R-Line |
| 2008 | Pontiac | G5 | Front | Fits vehicles with 5-lug wheels.; R-Line | ||
| 2007 | Chevrolet | Cobalt | 2.2L | L4 | Front | Fits vehicles with 5-lug wheels.; R-Line |
| 2007 | Pontiac | G5 | Front | Fits vehicles with 5-lug wheels.; R-Line |
* 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.