Dynamic Friction 641-31090 GeoSpec Dimpled Slotted Disc Brake Rotor

The Dynamic Friction Company (DFC) 641-31090 is a GeoSpec dimpled and slotted disc brake rotor engineered to deliver enhanced stopping performance over standard OE-style rotors. Combining precision dimpling and aggressive slotting, this rotor promotes efficient heat dissipation and continuous pad degassing during braking, helping maintain consistent brake response under demanding conditions.

GeoSpec Coating Technology:

• Patented silver-gray finish — a specially formulated coating that provides superior rust and corrosion resistance compared to conventional paint or zinc coatings
• Processed dry, ships dry — no cleaning or degreasing required before installation; the coating is safely swept away by friction material during break-in
• Non-directional surface finish — promotes faster, more even brake pad bed-in for quieter and smoother stops right from the start

Performance Features:

• Dimpled design — reduces heat buildup and minimizes brake fade during repeated or hard stops
• Slotted channels — continuously clean the brake pad surface, expel gases and debris, and maintain a consistent bite angle for reliable pedal feel
• Precision-machined to tight tolerances — each casting is machined at state-of-the-art facilities for optimal runout and thickness variation specs
• OE-quality construction — manufactured to meet or exceed original equipment standards for fit, form, and function

The DFC 641-31090 is sold individually and is ideal for drivers seeking an upgrade over a standard blank rotor without moving to a full drilled design. It is a direct-fit replacement that installs in the same time as a stock rotor with no modifications required.