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Dual calipers are heavy. Inline systems compromise pedal feel. The DRT4+2 is the evolution: a single, ultra-lightweight forged caliper with two fully independent hydraulic circuits. This is our premier rear brake solution for professional competition where there is no room for compromise.
The innovative dual-circuit design provides a dedicated 4-piston circuit for the hydraulic handbrake's massive locking power, and a separate 2-piston circuit for the foot brake. This ensures zero hydraulic interference and absolutely no pedal kickback. Paired with a thin, solid rotor for the sharpest thermal response and lowest possible rotational mass, the DRT4+2 delivers the surgical control required to dominate the competition. Each kit is a fully bespoke system, custom-engineered for your specific application.
The following data is essential for race engineers and professional builders. Note the independent piston circuits for isolated handbrake and foot brake operation, the ultra-lightweight caliper design, and the thin solid rotor for instant thermal response. As a Racing Series product, this kit can be configured with a range of specialized racing pad compounds upon consultation.
Caliper Engineering | |
---|---|
Series | Racing Series - Drift |
Model | DRT4+2 |
Mounting Position | Rear Axle |
Piston Arrangement | 4-Piston (Handbrake Circuit) + 2-Piston (Foot Brake Circuit) |
Piston Type | Race-Spec Ventilated Stainless Steel (No Dust Boots) |
Piston Diameter | 27 mm / 32 mm / 38 mm (1.06 in / 1.26 in / 1.50 in) |
Total Piston Area | 50.10 cm² (7.77 in²) |
Construction | 2-Piece Forged Aluminum Alloy |
Net Weight | 2.50 kg (5.51 lbs) (Single Caliper, No Pads) |
Finish | Nickel-Plated |
Min. Wheel Size | 17" Recommended |
Rotor Specification | |
Material | Racing-Grade High-Carbon Steel |
Dimensions | ⌀330–355 mm (13.0–14.0 in) × 12 mm (0.47 in) thick |
Construction | 1-Piece Solid |
Surface Patterns | Blank / Curved Slotted / Cross-Drilled |
Brake Pad Compound | |
Compound | M-05 Track Racing |
Operating Temp | Up to 750°C (1382°F) |
Friction Coefficient | 0.45 μ |
Supporting Hardware (Bespoke) | |
Brake Hoses | 3-Layer Stainless Steel Braided (PTFE Core, SUS304 Braid, PVC Sheath) |
Rotor Hat / Bell | Custom CNC-Machined 6061-T6 Aerospace-Grade Aluminum |
Caliper Bracket | Custom CNC-Machined S45C Forged Steel |
Every DRT4+2 kit is a custom-tailored solution. Our collaborative process ensures perfect integration with your chassis for a true bolt-on installation.
Your project begins with our motorsports engineers. We'll conduct a detailed consultation to understand your chassis, knuckle design, competition class, and performance goals.
For OEM Knuckles: Provide vehicle year, make, model, and detailed wheel specs.
For Custom Knuckles: Provide CAD files (IGES/STEP), technical drawings, or precise measurements of the mounting points.
Our engineers will design the bespoke mounting bracket and rotor hat for your application and provide final design specs for your team's approval before manufacturing begins.
Yes, this is a comprehensive, vehicle-specific system engineered for a complete bolt-on installation. Each DRT4+2 kit includes:
Our team is ready to help you configure the ultimate braking solution for your competition build. Contact our motorsports department to start your technical consultation today.
Start Your ConsultationYou’re here because you’re passionate about your ride, and so are we. We want your TTSPORT brake upgrade to be a total win. Here’s some straight talk to make sure everything goes smoothly, from fitment to bedding in.
Look, we know you get it. Your brake kit is custom-made for your specific car. That means once it's built, it's yours. We can only accept returns if there’s a genuine quality defect from our side.
Sometimes, aftermarket wheels can be tricky. Depending on the design, you might need spacers for clearance. We’ll do our best to help you figure it out, but issues related to wheel spacers don't qualify for a return.
To get this right the first time, we need your help. Before you order, please give us the following info:
We’ll likely ask you to confirm some measurements and send a few photos of your wheels. Please double-check everything you send us. TTSPORT isn't responsible for fitment issues if the specs you provided were off.
We check every single part before it leaves our shop. When your kit arrives, give it a good look-over. If you spot any potential quality issues, let us know within 24 hours.
This is key to awesome performance. Don't skip it.
We build our kits to last, and we stand by our work. Here’s the breakdown:
Recommended Service Intervals:
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