DBA DBA43051XS-10 4000 Series XS Drilled/Slotted Rear Rotor for 2018-21 WRX STI

Vehicle Fitment

• 2018-2021 Subaru WRX STI (Rear, Brembo Spec R 6-piston calipers)

Features

• DBA 4000 Series XS performance drilled/slotted rear brake rotor
• Drilled holes plus precision slots for enhanced cooling and gas evacuation
• High carbon alloyed iron construction for strength and improved thermal resistance
• Kangaroo Paw ventilation for increased internal airflow and heat dissipation
• Thermal Stability Profiling (TSP) reduces internal stress and distortion
• Universal non-directional pattern for left or right usage
• CNC precision machining for consistent pad contact and quiet operation
• Painted non-friction areas help resist corrosion

Specifications

• Part Number: DBA43051XS-10
• Series: 4000 Series XS Drilled & Slotted Rotor
• Position: Rear axle
• Outside Diameter: ~326 mm
• Nominal Thickness: ~20 mm; Minimum Thickness: ~18 mm
• Overall Height: ~62.5 mm
• Centering Diameter: ~58.02 mm; 10 bolt holes
• Surface: Drilled and slotted, vented
• Material: High carbon alloyed iron with TSP

Included Components

• 1x DBA 4000 Series XS Drilled/Slotted Rear Brake Rotor (DBA43051XS-10)

Product Description

The DBA DBA43051XS-10 4000 Series XS Drilled/Slotted Rear Brake Rotor is a high-performance direct replacement rotor engineered for the rear brake system on 2018-2021 Subaru WRX STI models equipped with Brembo Spec R 6-piston calipers. Its combined drilled hole and precision slot design helps evacuate heat, gases, and debris more effectively than standard rotors alone, improving cooling and pedal feel during spirited driving or occasional track use.

Constructed from high carbon alloyed iron and enhanced with Thermal Stability Profiling (TSP), the DBA43051XS-10 resists heat-induced distortion and offers durable performance under demanding conditions. Kangaroo Paw ventilation increases internal airflow for better heat dissipation. Sold individually, this rotor is a strong choice for performance-focused Subaru owners seeking improved rear braking response and fade resistance. Pair two units for a complete rear axle replacement.