Ford Mustang S550 / S650 (2015–2024) – DBA T3 4000 Series Front Brake Kit (DBA42166S + DB9021XP)
This DBA 4000 Series T3 brake kit with Xtreme Performance pads is a serious upgrade for Mustang owners looking for higher initial bite and consistent braking performance across a wide temperature range.
Designed for fast road driving, heavy use and occasional track days, this kit delivers stronger stopping power, improved heat management and greater confidence under demanding conditions compared to standard OEM setups.
What’s Included
- 2x DBA42166S – 4000 Series T3 Slotted Discs
- 1x DB9021XP – Xtreme Performance Brake Pads (Front Axle)
A fully matched disc and pad combination designed and tested to work together.
Key Features
- Complete front brake upgrade kit
- T3 slotted rotors for improved bite and gas dispersion
- 4000 Series high carbon alloy discs for strength and durability
- Xtreme Performance pads for higher friction and braking force
- Direct fit replacement with no modifications required
- Matched components from a single manufacturer
Performance Benefits
This kit is built for drivers who need more from their braking system.
The T3 slot design increases out-gassing exit points, helping maintain consistent pad contact and improving braking response under repeated heavy use.
DBA’s Kangaroo Paw ventilation system improves cooling efficiency, reducing heat build-up and brake fade during aggressive driving.
Xtreme Performance pads deliver strong initial bite and maintain consistent friction from low to high temperatures, making them suitable for demanding road use and occasional track work.
Disc Technology
DBA 4000 Series discs feature:
- Kangaroo Paw ventilation system with 144 diamond and tear drop pillars for improved cooling
- T3 slot design for enhanced braking response and pad cleaning
- Thermal Stability Profiling to improve durability under heavy braking conditions
Pad Performance
DBA Xtreme Performance pads are designed for higher load applications:
- Semi-metallic, carbon fibre friction material
- G-G friction rating (0.45 average mu across temperature range)
- Excellent high temperature performance
- Consistent braking performance up to 550°C
- Strong initial bite and improved stopping power
Specifications
Discs – DBA42166S
- Diameter: 380mm
- Thickness: 34mm
- Minimum Thickness: 32mm
- Vent Type: Kangaroo Paw
- Number of Holes: 5
- Inner Diameter: 71mm
- Height: 64mm
- Stage: Stage 4
- Weight: 15.25kg (each)
Pads – DB9021XP
- Width: 189.6mm
- Height: 85.2mm
- Thickness: 15.5mm
- FMSI: 9021-D1792
- OEM Reference: FR3Z2001H
- ECE R90: E11 R90-02A01584/53206
- Axle: Front
- Weight: 3.92kg
Why This Kit?
- Higher friction and stronger braking performance than standard setups
- Improved heat resistance for repeated heavy braking
- More consistent pedal feel under load
- Suitable for fast road driving and occasional track use
- Direct fit upgrade with no modifications required
Vehicle Fitment
Ford Mustang (6th Generation – S550 / early S650)
- 5.0 V8 (416BHP)
- Model years: 2015–2024
- Front axle
Important Information
- Direct replacement for factory front brake setup
- No modifications required
- Professional installation recommended
- Always follow correct bedding-in procedure after installation
Why We Rate It
This is the next step up from Street Performance pads and suits drivers who push their cars harder.
More bite, more heat capacity and more consistency when it matters.
Final Word
If you want stronger braking and more confidence under hard use, this kit delivers exactly that.
A proper upgrade for Mustangs that are driven properly.
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