OE Quality
60-Day Returns

Dynamite Friction 631-80037R Disc Brake Rotor - Rear Right
Overview of the DFC Brake Rotor for Mazda Miata
The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-80037R) is engineered specifically for Mazda Miata models. This solid disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.
- Compatible with Mazda Miata vehicles
- Solid rotor design with drilled and slotted surface
- Nominal thickness of 10 mm and discard thickness of 8 mm
- Zinc silver hat finish with rust-resistant coating
- 4 bolt holes with a 100 mm bolt circle diameter
- Overall diameter of 275.5 mm and center hole diameter of 55.1 mm
- Directional brake surface for optimized braking
Details on the DFC Brake Rotor - Drilled and Slotted - Silver Line
The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on rotors that combine drilled holes and slots to improve brake pad bite and reduce heat buildup. The silver zinc coating on the rotor hat provides corrosion resistance, extending rotor life. This product line is designed to meet the demands of drivers seeking reliable braking performance with enhanced cooling characteristics.
Technical Specifications and Features
This disc brake rotor is a solid type with a nominal thickness of 10 mm and a discard thickness of 8 mm, ensuring safe replacement intervals. The rotor’s surface is both drilled and slotted, which helps evacuate gases and debris from the braking surface, improving pad contact and reducing brake fade. The rotor hat is finished in zinc silver, providing rust resistance, which is critical for maintaining rotor integrity over time. With 4 bolt holes and a bolt circle diameter of 100 mm, this rotor is designed to fit the Mazda Miata precisely. The overall diameter measures 275.5 mm, and the center hole diameter is 55.1 mm, matching OEM specifications for proper fitment.
Applications and Problem Solving
- Replacement rotor for worn or warped brake rotors on Mazda Miata
- Improves heat dissipation to reduce brake fade during spirited driving
- Helps maintain consistent braking performance under heavy use
- Addresses rust and corrosion issues with zinc silver coating
- Enhances braking surface contact with directional drilled and slotted design
Installation Notes and Tips
Ensure the rotor thickness is above the discard thickness of 8 mm before installation. Clean the rotor surface to remove any protective coatings or residues before mounting. Verify bolt hole alignment with the 4-lug pattern and 100 mm bolt circle diameter on the Mazda Miata. Use proper torque specifications for lug nuts to avoid rotor warping. Directional rotors must be installed with the correct rotation direction for optimal performance.
Quality Assurance
Dynamite Friction manufactures the 631-80037R rotor to meet strict quality standards. The rust-resistant zinc silver finish helps extend rotor life. While no specific warranty information is provided, the rotor is designed to meet OEM fit and function requirements for the Mazda Miata.
| Brand | Dynamite Friction |
|---|---|
| Part Number | 631-80037R |
| Position | DFC Brake Rotor - Drilled and Slotted - Silver, Rear Right |
| Discard Thickness | 8 |
| Nominal Thickness | 10 |
| Disc Finish | Plain |
| Hat Finish | Zinc silver |
| Rust Resistant Coating | Yes |
| Bolt Hole Quantity | 4 |
| Overall Height | 34.4 |
| Outside Diameter | 275.5 |
| Height | 34.4 |
| Surface Type | Slotted x drilled |
| Solid Or Vented Type Rotor | Solid |
| Center Hole Diameter | 55.1 |
| Stud/Lug Hole Quantity | 4 |
| Stud/Lug Hole Diameter | 13 |
| Directional or Non-Directional Brake Surface | Directional |
| Bolt Circle Diameter | 100 |
| Stud/Lug Hole Circle Diameter | 100 |
This part fits 5 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2005 | Mazda | Miata | Rear Right | DFC Brake Rotor - Drilled and Slotted - Silver |
| 2004 | Mazda | Miata | Rear Right | DFC Brake Rotor - Drilled and Slotted - Silver |
| 2003 | Mazda | Miata | Rear Right | DFC Brake Rotor - Drilled and Slotted - Silver |
| 2002 | Mazda | Miata | Rear Right | Sport & Hard Suspensions; DFC Brake Rotor - Drilled and Slotted - Silver |
| 2001 | Mazda | Miata | Rear Right | Sport & Hard Suspensions; DFC Brake Rotor - Drilled and Slotted - Silver |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.