Dynamic Friction 4512-21085 Disc Brake Kit - Rear

Brake kit overview

The DFC brake kit 4512-21085 combines coated rotors, 5000 Advanced ceramic pads, and hardware for a complete brake service package. It is built for rear brake applications on select Genesis G90 and Kia K900 models, with OE-style fitment and corrosion-resistant rotor protection.

• DFC GEOSPEC coated rotors resist rust and arrive dry, ready for installation.
• 5000 Advanced ceramic pads are post-cured for stable friction performance.
• Scorched pad surfaces reduce initial break-in time.
• Rubber-steel-rubber shims help control noise, vibration, and harshness.
• Hardware is included for a more complete brake service.

Product details

Part number 4512-21085 is a DFC complete disc brake kit engineered around rotor, pad, and hardware replacement in one service. The GEOSPEC rotor coating is designed to provide durable corrosion protection and a silver-gray finish, while the non-directional rotor finish supports even pad bed-in and smoother braking feel. DFC also states that the rotors are machined to OE specifications and inspected for critical dimensions and balance.

The 5000 Advanced pad formulation is developed with OEM friction input and uses post-curing plus scorching to improve consistency from the first stop. For drivers servicing a Genesis G90 or Kia K900 rear brake system, this kit brings together the main wear components needed for a proper brake refresh. The part number 4512-21085 may also be referenced when sourcing the same application.

What this kit helps address

• Brake noise from worn pads or fatigued hardware
• Uneven braking caused by rotor wear or pad glazing
• Rust buildup on exposed rotor surfaces
• Longer pedal response from aged friction components
• Excessive caliper movement related to worn hardware

Installation notes

Compatible With rear brake service on 2019-2020 Kia K900 and 2020-2022 Genesis G90 applications listed in the fitment data. Verify rotor style and notes before installation, especially on 2020 Genesis G90 models with optional full cast front disc configurations and 2021-2022 models with original design aluminum hat front rotors noted in the catalog data. The rotors are shipped dry and ready to install without additional preparation.

Quality assurance

DFC states that each rotor is manufactured to OE specifications and undergoes inspection for critical attributes, with balance correction applied where needed. The rotors carry a 12-month warranty against defects in material and workmanship.