DBA DBA43051S-10 4000 Series T3 Slotted Rear Rotor for 2018-2021 Subaru WRX STI

Vehicle Fitment

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

Features

• DBA 4000 Series T3 high-performance slotted rear brake rotor
• Tri-symmetrical slot pattern increases pad bite and outgassing
• Kangaroo Paw 144 pillar ventilation improves heat dissipation
• High carbon alloyed iron construction for strength and durability
• Thermal Stability Profiling (TSP) reduces internal stresses
• CNC precision machined slots for smoother, quieter operation
• Universal slot design works on left or right rear axle
• Painted non-friction areas help resist corrosion

Specifications

• Part Number: DBA43051S-10
• Series: 4000 Series T3 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: Precision slotted and vented
• Material: High carbon alloyed iron with TSP

Included Components

• 1x DBA 4000 Series T3 Slotted Rear Brake Rotor (DBA43051S-10)

Product Description

The DBA DBA43051S-10 4000 Series T3 Slotted Rear Brake Rotor is a direct-replacement performance rotor engineered for the rear braking system on 2018-2021 Subaru WRX STI models equipped with Brembo Spec R 6-piston calipers. Featuring DBA's patented Tri-symmetrical slot design and Kangaroo Paw ventilation system, this rotor helps evacuate heat, friction gases, and debris more effectively than standard OEM rotors. Its high carbon alloyed iron construction and Thermal Stability Profiling provide improved resistance to thermal distortion and enhanced durability under repeated performance use.

Designed for spirited street driving and occasional track use, the DBA43051S-10 offers better pad engagement, smoother braking feel, and reduced fade compared with typical OEM rear rotors. Precision-machined slots enhance cooling and maintain consistent rotor surface contact with brake pads. Sold individually, this rotor is intended to be paired with a matching left/right unit for complete rear axle replacement with balanced performance.