Dynamic Friction 4004-31086 DFC GeoSpec Coated Plain Disc Brake Rotor Set

The Dynamic Friction Company (DFC) 4004-31086 GeoSpec Coated Plain Brake Rotor Set delivers OE-quality stopping performance with superior corrosion protection. Engineered to match original equipment specifications in form, fit, and function, these plain (smooth) rotors are an ideal direct-replacement upgrade for everyday driving, commuting, towing, and performance street use.

GeoSpec® Coating Technology:

• Fully coated inside and out with a patented rust-prevention coating that forms a durable, attractive silver-gray finish
• Provides superior corrosion protection compared to conventional paint or zinc coatings
• Processed dry, shipped dry, and ready to install — no pre-degreasing or additional preparation required
• Coating is safely swept away by friction material during bed-in with no harmful effects on braking performance

Premium Engineering & Construction:

• Cast from premium G3000/G11H18 iron for superior strength, stability, and durability
• OE vane configuration ensures proper and maximum heat dissipation
• CNC-machined to the tightest tolerances available
• Non-directional finish promotes faster, more even brake pad bed-in for quieter, smoother stops
• 100% precision mill-balanced for vibration-free braking at any speed
• Each rotor passes a 100% inspection station verifying all critical attributes meet OE specifications
• No modifications required for installation

DFC GeoSpec rotors are engineered to meet the same form, fit, and function as OEM brake rotors, making them a reliable, long-lasting replacement for worn or corroded disc brake rotors. The 4004-series set includes a pair of GeoSpec coated plain rotors for a complete axle replacement.