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Raybestos 66840R Disc Brake Rotor - Rear
Overview of Raybestos R-Line 66840R Disc Brake Rotor
The Raybestos R-Line 66840R disc brake rotor is engineered for reliable braking performance on select Ford, Jaguar, and Lincoln vehicles. Designed as a vented, conventional rotor, it offers consistent heat dissipation and durability for models like the Ford Thunderbird and Jaguar XJ8.
- Vented disc brake rotor for improved cooling
- Overall height: 1.275 inches (32.400 mm)
- Outside diameter: 11.335 inches (287.900 mm)
- Mounting bolt hole quantity: 5 with 4.250 inch (107.950 mm) bolt circle diameter
- Center hole diameter: 2.538 inches (64.450 mm)
- Nominal thickness: 0.790 inches (20.050 mm)
- Discard thickness: 0.728 inches (18.500 mm)
- Compatible with Ford LS, Thunderbird, Jaguar S-Type, XJ8, XJR, Lincoln Vanden Plas
Detailed Product Description
The Raybestos R-Line 66840R rotor is a vented, conventional disc brake rotor designed to meet the specifications required by various Ford, Jaguar, and Lincoln models. Its vented design enhances heat dissipation during braking, reducing the risk of brake fade under demanding conditions. The rotor features a nominal thickness of 0.790 inches (20.050 mm) and a discard thickness of 0.728 inches (18.500 mm), ensuring safe and effective braking performance throughout its service life. With an overall height of 1.275 inches (32.400 mm) and an outside diameter of 11.335 inches (287.900 mm), this rotor fits vehicles equipped with a 5-bolt mounting pattern and a 4.250 inch (107.950 mm) bolt circle diameter. The center hole diameter of 2.538 inches (64.450 mm) ensures proper alignment and fitment.
R-Line Product Line Information
The Raybestos R-Line product line focuses on delivering reliable, OE-quality brake components designed for a range of domestic and import vehicles. The R-Line rotors, including the 66840R, are engineered to meet or exceed original equipment specifications, providing consistent performance and durability. This line is suitable for drivers seeking dependable replacement parts that maintain factory braking standards.
Common Applications and Issues Addressed
- Replacement for worn or warped rotors causing brake pulsation
- Restores braking efficiency on Ford Thunderbird and Jaguar S-Type models
- Addresses rotor thickness below discard limits to maintain safety
- Improves heat dissipation to reduce brake fade during heavy use
- Compatible with Lincoln Vanden Plas and Jaguar XJR for proper fitment
Installation Notes and Tips
- Verify rotor thickness before installation to ensure it meets nominal specifications
- Clean mounting surfaces to prevent uneven rotor seating
- Torque mounting bolts to manufacturer specifications for secure fitment
- Inspect brake pads and replace if worn to optimize rotor performance
- Check for proper alignment with 5-bolt mounting pattern and 4.250 inch bolt circle diameter
Quality Assurance and Warranty
Raybestos R-Line rotors are manufactured to meet strict quality standards, ensuring consistent performance and durability. While specific warranty details for part number 66840R may vary, Raybestos typically offers coverage against defects in materials and workmanship. Always consult product documentation or manufacturer resources for exact warranty terms.
| Brand | Raybestos |
|---|---|
| Part Number | 66840R |
| Position | R-Line, Rear |
| Center Hole Diameter | 2.538 |
| Center Hole Diameter | 64.450 |
| Conventional Or Drum-In-Hat Type Rotor | Conventional |
| Discard Thickness | 0.728 |
| Discard Thickness | 18.500 |
| Mounting Bolt Hole Circle Diameter | 4.250 |
| Mounting Bolt Hole Circle Diameter | 107.950 |
| Mounting Bolt Hole Diameter | 4.250 |
| Mounting Bolt Hole Diameter | 107.950 |
| Mounting Bolt Hole Quantity | 5 |
| Nominal Thickness | 0.790 |
| Nominal Thickness | 20.050 |
| Outside Diameter | 11.335 |
| Outside Diameter | 287.900 |
| Overall Height | 1.275 |
| Overall Height | 32.400 |
| Solid Or Vented Type Rotor | Vented |
| Stud/Lug Hole Quantity | 5 |
This part fits 26 vehicles. Search below:
| Year | Make | Model | Submodel | Position | Notes |
|---|---|---|---|---|---|
| 2006 | Jaguar | Vanden Plas | Rear | To Chassis # G49700; R-Line | |
| 2006 | Jaguar | XJ8 | Rear | To Chassis # G49700; R-Line | |
| 2006 | Lincoln | LS | Rear | R-Line | |
| 2005 | Ford | Thunderbird | Rear | R-Line | |
| 2005 | Jaguar | S-Type | Base | Rear | R-Line |
| 2005 | Jaguar | S-Type | Sport | Rear | R-Line |
| 2005 | Jaguar | Vanden Plas | Rear | To Chassis # G49700; R-Line | |
| 2005 | Jaguar | XJ8 | Rear | R-Line | |
| 2005 | Lincoln | LS | Rear | R-Line | |
| 2004 | Ford | Thunderbird | Rear | R-Line | |
| 2004 | Jaguar | S-Type | Rear | R-Line | |
| 2004 | Jaguar | Vanden Plas | Rear | R-Line | |
| 2004 | Jaguar | XJ8 | Rear | R-Line | |
| 2004 | Lincoln | LS | Rear | R-Line | |
| 2003 | Ford | Thunderbird | Rear | R-Line | |
| 2003 | Jaguar | S-Type | Rear | R-Line | |
| 2003 | Jaguar | XJ8 | Rear | Replaces 1066840; Raybestos R-Line | |
| 2003 | Jaguar | XJR | Rear | Replaces 1066840; Raybestos R-Line | |
| 2003 | Lincoln | LS | Rear | R-Line | |
| 2002 | Ford | Thunderbird | Rear | R-Line | |
| 2002 | Jaguar | S-Type | Rear | R-Line | |
| 2002 | Lincoln | LS | Rear | R-Line | |
| 2001 | Jaguar | S-Type | Rear | R-Line | |
| 2001 | Lincoln | LS | Rear | R-Line | |
| 2000 | Jaguar | S-Type | Rear | R-Line | |
| 2000 | Lincoln | LS | Rear | 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.