Upgrade the rear braking system on your 2020+ Chevrolet Corvette C8 Z51 with the DBA Brakes DBA43929S T3 4000 Series Rear Brake Rotors. DBA's 4000 Series T3 is a direct-replacement, single-piece performance rotor designed for drivers seeking braking performance beyond standard OE levels. The DBA43929S combines high-carbon alloyed iron construction, Thermal Stability Profiling, DBA's patented T3 slot design, and Kangaroo Paw ventilation technology in a performance-oriented replacement rotor.

DBA manufactures its 4000 Series rotors from high-carbon alloyed iron and subjects them to Thermal Stability Profiling. DBA states that these heat-treatment cycles realign the microstructure of the iron, increasing rotor stability and durability while allowing the rotor to withstand the increased stress and heat generated during intense braking applications.

The T3 friction surface incorporates DBA's patented bi-directional slot design. Building upon the company's T2 slot, T3 adds precision CNC-machined tri-symmetrical slots that provide additional exit paths for brake-pad friction dust and gases. DBA states that this helps increase the consistency and effectiveness of braking while providing a quieter, smoother, and more responsive pedal feel. DBA recommends T3 rotors for high-performance applications.

DBA's 4000 Series also features its Kangaroo Paw ventilation technology. This design uses 144 diamond- and teardrop-patterned pillars between the rotor faces rather than conventional straight vanes. DBA states that the design can provide up to 30% more internal surface area and approximately 20% improved cooling efficiency compared with a traditional straight-vane design.

Additional 4000 Series technology includes center-split core castings for improved heat transfer, a Cubic Boron Nitride machine-turned finish designed to minimize disc-thickness variation, anti-rust protection on non-friction surfaces, and thermographic heat-paint markings that change color at specific temperature thresholds to help monitor brake temperatures and rotor fatigue.

For the 2020+ Corvette C8 Z51 application specified for this listing, the DBA43929S provides a performance-focused rear rotor upgrade that retains direct-replacement, single-piece construction while adding DBA's T3 slotting, high-carbon metallurgy, thermal treatment, and advanced cooling technology.

Key Features

• DBA Brakes T3 4000 Series Rear Brake Rotors
• Rear axle application
• Complete rear-axle set
• Direct-replacement performance brake rotor
• Single-piece rotor construction
• Patented T3 bi-directional slot design
• Precision CNC-machined tri-symmetrical slots
• Additional exit paths for brake-pad friction dust and gases
• Designed to improve braking consistency and effectiveness
• Designed for smoother and more responsive pedal feel
• DBA recommends T3 for high-performance applications
• Symmetrical slotting for universal left/right use
• High-carbon alloyed iron construction
• DBA Thermal Stability Profiling
• Heat treatment designed to increase rotor stability and durability
• Designed to withstand repeated high-temperature braking
• DBA Kangaroo Paw ventilation technology
• 144 diamond- and teardrop-patterned internal pillars
• Up to 30% increased internal surface area compared with a traditional straight-vane design
• Up to 20% improved cooling efficiency compared with a traditional straight-vane design
• Center-split core casting
• Designed for increased heat transfer and thermal efficiency
• Cubic Boron Nitride machine-turned finish
• Designed to minimize disc-thickness variation
• Helps minimize the potential for pad knock and premature wear
• Thermographic heat-paint markings
• Helps monitor braking temperatures and rotor fatigue
• Anti-rust painted non-friction surfaces
• Slotted friction surface
• Outer diameter: 350mm
• Nominal rotor thickness: 27mm
• Minimum rotor thickness: 25mm
• Overall height: 47mm
• Centering diameter: 67.4mm
• Pitch-circle diameter: 120mm

Important Notes

• DBA identifies DBA43929S specifically as a Rear 4000 Series T3 Brake Rotor.
• The T3 design uses additional precision CNC-machined tri-symmetrical slots based on DBA's earlier T2 slot configuration.
• DBA states that the additional T3 slots increase the number of exit points available for brake-pad friction dust and gases.
• According to DBA, the T3 configuration helps improve braking consistency and effectiveness while contributing to a quieter, smoother, and more responsive pedal feel.
• DBA recommends T3 slotting for high-performance and heavy off-road applications; the high-performance recommendation is the relevant use case for this Corvette application.
• DBA lists bi-directional use as a 4000 Series feature. Symmetrical slotting allows universal left/right use rather than requiring separate left- and right-side rotor SKUs.
• DBA43929S is a complete single-piece rotor. It is not a replacement friction ring or two-piece rotor assembly.
• DBA describes the 4000 Series as a direct-replacement single-piece rotor intended for drivers seeking upgraded braking performance beyond standard OE levels.
• DBA manufactures its 4000 Series rotors from high-carbon alloyed iron.
• Thermal Stability Profiling heat-treatment cycles are used to realign the microstructure of the iron, which DBA says increases rotor stability and durability.
• DBA states that the high-carbon alloy formulation increases the rotor's ability to handle constant and extreme heat over prolonged periods.
• DBA's Kangaroo Paw ventilation system uses 144 diamond- and teardrop-patterned internal pillars.
• DBA claims up to a 30% increase in internal surface area and approximately 20% improved cooling efficiency compared with a traditional straight-vane design.
• Center-split core castings are used to increase heat transfer and thermal efficiency.
• DBA uses a Cubic Boron Nitride machine-turned finish designed to minimize disc-thickness variation and the potential for pad knock and resulting premature wear.
• Anti-rust paint is applied to non-friction areas to help prevent corrosion and maintain appearance.
• Thermographic heat-paint markings change color at specific temperature thresholds to assist with monitoring brake temperatures and rotor fatigue.
• DBA notes that some variants may not contain every general 4000 Series feature.
• Inspect the brake pads when replacing the rotors. Pads showing excessive wear, cracking, glazing, contamination, taper, or heat damage should be replaced.