Dynamic Friction 9504-31138 GEOMET Coated Plain Disc Brake Rotor Set

Built from premium G3000/G11H18 iron castings, these rotors provide superior strength, stability, and thermal conductivity compared to standard gray iron discs.

Each rotor is CNC-machined to the tightest tolerances in the market, with guaranteed specs of .010mm maximum disc thickness variation (DTV) and .050mm maximum lateral runout — ensuring vibration-free, consistent braking at any speed. A fine-turned finish of 1.6 RMS promotes faster, more even brake pad bed-in for quieter and smoother stops right from the start.

The rotors are finished with a genuine GEOMET® coating applied across the entire surface — including the hat and vanes — providing superior corrosion protection over conventional zinc or paint coatings. The coating is processed dry and shipped dry, so these rotors are ready to install with no pre-degreasing or additional preparation required, saving time and labor during installation.

Key Features:

• Hi-Carbon alloy (Molybdenum, Chromium, Carbon) iron castings for enhanced noise dampening and durability
• Genuine GEOMET® corrosion protection coating — superior to zinc or conventional paint
• 100% precision mill-balanced for zero vibration at any speed
• CNC-machined to .010mm DTV and .050mm lateral runout tolerances
• OE vane configuration for proper and maximum heat dissipation
• Fine-turned 1.6 RMS finish for improved pad break-in and quieter stops
• Plain (smooth/blank) disc surface — ideal for street and daily driving
• Ready to install — no cleaning or prep work required
• 100% electronically inspected — over 20 quality attributes verified per rotor
• Designed to meet OEM form, fit, and function specifications

Backed by Dynamic Friction Company's 1-year limited warranty against defects in materials and workmanship, the 9504-31138 rotor set is the ideal OE replacement for drivers seeking long-lasting performance and superior corrosion resistance.