Dynamic Friction 4004-31075 GeoSpec Coated Drilled Disc Brake Rotor

The Dynamic Friction Company 4004-31075 is a GeoSpec Coated Cross-Drilled Disc Brake Rotor engineered as a direct OEM replacement with added corrosion resistance and performance benefits. DFC's patented GeoSpec coating forms a durable, attractive silver-gray finish that provides superior rust protection compared to conventional paint or zinc coatings.

Each rotor is processed dry and shipped dry, arriving ready to install with no additional degreasing or preparation required — saving time and money during the brake job.

Key Features:

• GeoSpec Coating: Patented silver-gray finish fights rust and corrosion far better than zinc or conventional paint coatings
• Cross-Drilled Holes: Chamfered drill holes reduce heat buildup on the rotor surface and minimize the risk of cracking
• Premium G3000/G11H18 Iron Castings: Engineered for strength, stability, and long-lasting durability
• CNC-Machined to Tight Tolerances: Ensures precise fitment and consistent braking performance
• OE Vane Configuration: Original Equipment vane design ensures proper and maximum heat dissipation
• Non-Directional Surface Finish: Promotes faster brake pad bed-in and quieter, smoother stops
• 100% Mill-Balanced: Precision cut and electronically mill-balanced to eliminate vibration at any speed
• Direct OEM Replacement: Designed to match the same form, fit, and function as the original factory rotor — no modifications required
• Ready to Install: No pre-degreasing needed; coating is safely swept away by friction material during break-in with no harmful effects

The Dynamic Friction 4004-31075 GeoSpec Drilled Rotor delivers the ideal balance of OEM reliability and enhanced corrosion protection, making it an excellent upgrade for drivers seeking a longer-lasting, better-looking brake rotor without sacrificing fitment or compatibility.