Complete TTSPORT EP4S rear wheel big brake kit, showing the 4-piston forged calipers with EPB motor, slotted 2-piece floating rotor, performance pads, and steel-braided brake lines.
Close-up of a red TTSPORT EP4S 4-piston forged brake caliper with EPB motor for the rear wheel and a slotted 2-piece floating rotor.
Detailed view of the 4 pistons and 1 motor with dust boot inside a TTSPORT EP4S forged brake caliper.
A red TTSPORT EP4S 4-piston big brake kit is installed on the 19" rear wheel.
Unboxing the complete TTSPORT EP4S performance big brake kit, including all components: calipers, rotors, pads, brake line, and mounting hardware.
Customization options for the TTSPORT EP4S brake kit, featuring available caliper colors (red, blue, green, orange), rotor designs (drilled and slotted), and rotor materials (steel and carbon ceramic).
Complete TTSPORT EP4S rear wheel big brake kit, showing the 4-piston forged calipers with EPB motor, slotted 2-piece floating rotor, performance pads, and steel-braided brake lines.
Close-up of a red TTSPORT EP4S 4-piston forged brake caliper with EPB motor for the rear wheel and a slotted 2-piece floating rotor.
Detailed view of the 4 pistons and 1 motor with dust boot inside a TTSPORT EP4S forged brake caliper.
A red TTSPORT EP4S 4-piston big brake kit is installed on the 19" rear wheel.
Unboxing the complete TTSPORT EP4S performance big brake kit, including all components: calipers, rotors, pads, brake line, and mounting hardware.
Customization options for the TTSPORT EP4S brake kit, featuring available caliper colors (red, blue, green, orange), rotor designs (drilled and slotted), and rotor materials (steel and carbon ceramic).

Evolution EP4S Rear Wheel 4-Piston Brake Kit

$1,510.00 USD
$1,510.00 USD
(-0%)
Caliper Color: Standard Color (As Shown in the Image)
Rotor Size: 345x28mm (Wheel ≥ 18″)
Rotor Material & Design: Steel - Curved Slotted
Subtotal: $1,510.00
Complete TTSPORT EP4S rear wheel big brake kit, showing the 4-piston forged calipers with EPB motor, slotted 2-piece floating rotor, performance pads, and steel-braided brake lines.

Evolution EP4S Rear Wheel 4-Piston Brake Kit

$1,510.00
Complete TTSPORT EP4S rear wheel big brake kit, showing the 4-piston forged calipers with EPB motor, slotted 2-piece floating rotor, performance pads, and steel-braided brake lines.
Close-up of a red TTSPORT EP4S 4-piston forged brake caliper with EPB motor for the rear wheel and a slotted 2-piece floating rotor.
Detailed view of the 4 pistons and 1 motor with dust boot inside a TTSPORT EP4S forged brake caliper.
A red TTSPORT EP4S 4-piston big brake kit is installed on the 19" rear wheel.
Unboxing the complete TTSPORT EP4S performance big brake kit, including all components: calipers, rotors, pads, brake line, and mounting hardware.
Customization options for the TTSPORT EP4S brake kit, featuring available caliper colors (red, blue, green, orange), rotor designs (drilled and slotted), and rotor materials (steel and carbon ceramic).

Evolution EP4S Rear Wheel 4-Piston Brake Kit

$1,510.00
Caliper Color: Standard Color (As Shown in the Image)
Rotor Size: 345x28mm (Wheel ≥ 18″)
Rotor Material & Design: Steel - Curved Slotted
Product Detail
Product Detail
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The No-Compromise Rear Upgrade: EP4S Integrated EPB Caliper Kit

Rear brake "upgrades" that force you to delete your factory electronic parking brake are a downgrade. The EP4S is the engineered solution. This kit provides a true 4-piston hydraulic performance caliper while seamlessly integrating with your vehicle's OEM electronic parking brake (EPB) system. No warning lights, no sacrificed features—just a massive improvement in braking performance.

When paired with a powerful front big brake kit, the EP4S restores critical rear brake contribution, allowing your car to remain stable and planted during threshold braking. Built from a rigid two-piece forged aluminum body and featuring ventilated pistons with high-temp seals, the EP4S delivers consistent, fade-free bite while shedding unsprung weight. It's the complete, no-compromise rear braking solution for the modern performance vehicle.

Technical Specifications & Kit Options

The following data highlights the engineering behind the EP4S's unique capabilities. Note the specific hydraulic piston area, designed to perfectly balance our front brake systems, and the integrated EPB design. Your kit comes standard with our M-01 (For Steel Rotors) or M-03 (For Carbon Ceramic Rotors) street performance brake pads.

Caliper Engineering
Series Evolution Series
Model EP4S
Mounting Position Rear Axle
Piston Count 4 (Hydraulic) + Integrated EPB Motor
Piston Type 2-Piece Vented with Dust Boots
Piston Diameter 28 mm (1.10 in) × 4
Total Piston Area 24.63 cm² (3.82 in²) (Hydraulic)
Construction 2-Piece Forged Aluminum Alloy
Net Weight 4.50 kg (9.92 lbs) (Single Caliper, No Pads)
Finish High-Temperature Gloss Coating
Min. Wheel Size 18" Recommended
Required Rotor Size ⌀345–380 mm (13.6–15.0 in) × 28 mm (1.10 in) thick
Rotor Options (Select One)
Material High-Carbon Steel Carbon-Ceramic Composite
Construction 2-Piece Fixed (345&355mm) or Floating (380mm+) 2-Piece Floating
Venting Directional Vented Directional Vented
Surface Patterns Curved Slotted / Grainslot / Waveslot / Drilled & Slotted Cross-Drilled Only
Brake Pad Compounds
Application For Steel Rotors For Carbon-Ceramic Rotors
Compound Model M-01 Street Performance M-03 Ceramic Performance
Operating Temp Up to 600°C (1112°F) Up to 750°C (1382°F)
Friction Coefficient 0.38 µ 0.44 µ
Supporting Hardware (Vehicle-Specific)
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

Will It Fit? Your 3-Step Check

Step 1: EP4S rear caliper requires 18-inch or larger wheels for fitment.
1. Wheel Diameter

Confirm you are running 18" or larger wheels.

Step 2: Diagram showing measurement from wheel hub to inner spoke, requiring 92 mm or 3.62 in clearance.
2. Spoke Clearance

Measure from the rotor mounting face to the back of the wheel spokes. You need at least 92 mm (3.62 in) of clearance.

Step 3: Check your vehicle's make and model against the compatibility list below.
3. Vehicle Model

Please use the vehicle filter or contact us to confirm.

Want a printable fitment template? Contact us with your vehicle's year, make, and model, and we'll email you a 1:1 wheel-clearance template.

Frequently Asked Questions

How does the electronic parking brake (EPB) work?
The EP4S caliper features an integrated electric motor. When you activate your car's factory parking brake button, this motor mechanically clamps the brake pads to hold the vehicle securely. The user experience is identical to stock, but it's paired with a much stronger hydraulic caliper for driving.
Is the electrical connection plug-and-play?
For all supported applications, yes. The EP4S is designed with an OEM-style electrical connector that plugs directly into your vehicle's factory harness. No cutting, splicing, or coding is required. The brake hardware installs just like a standard big brake kit.
Why should I upgrade my rear brakes?
Braking is a team sport. A big front brake kit does the heavy lifting but shifts the brake bias far forward. The ES4 restores the rear axle's contribution, stabilizing the chassis during heavy braking. This improves overall stopping distance, reduces nose dive, and provides a more balanced, confident pedal feel, allowing you to get the most out of your front kit.

See The EP4S In Action

Check out how other enthusiasts are running our big brake kits on their builds. Real cars, real results.

View Customer Builds
Care Guide
Care Guide
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Heads Up! What to Know Before You Install

You’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.

Our Return Policy

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.

1. Let's Nail the Fitment

To get this right the first time, we need your help. Before you order, please give us the following info:

  • Your vehicle's Make, Model, Year, and VIN.
  • Your wheel size and specs.

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.

2. The Fun Part: Bedding In Your New Brakes

This is key to awesome performance. Don't skip it.

  1. Find a safe, open road. Bring your car up to 40 mph (approx. 65 km/h) and apply firm, steady pressure to slow down to 10 mph (approx. 15 km/h). Don't come to a complete stop. Do this 10 times to get the pads and rotors acquainted.
  2. For the next 300-600 miles (approx. 500-1,000 km), take it easy. No crazy hard stops. This cures the pads and rotors and ensures a long, happy life.
  3. You'll notice our high-carbon steel rotors have a colored, grooved surface. This isn't just for looks—it helps speed up the bedding-in process and fights off corrosion.

3. Our Promise: The TTSPORT Warranty

We build our kits to last, and we stand by our work. Here’s the breakdown:

  • Calipers: Covered for 1 year against manufacturing defects. We also offer lifetime maintenance (you just pay for parts).
  • Rotors & Hoses: Covered for 90 days against manufacturing defects. These are wear items, but you can expect them to last 25,000-35,000 miles (approx. 40,000-60,000 km) depending on your driving style.
  • Brake Pads: Covered for 90 days against manufacturing defects. Typically good for 15,000-25,000 miles (approx. 25,000-40,000 km).
  • Custom Hats/Brackets: We guarantee they'll fit perfectly out of the box. Once they're installed, they're not covered under warranty.

4. Pro Tips for Long-Lasting Performance

  1. After a session of hard driving, let your brakes cool down naturally. Don't spray them with cold water—that's a fast way to warp rotors.
  2. Brakes feel different in the rain. Give yourself some extra stopping distance.
  3. If you hear or feel anything weird—grinding, shaking, etc.—talk to your installer right away.

Recommended Service Intervals:

  • Rotors: Replace them when wear exceeds 3 mm (approx. 0.12 inches).
  • Front Pads: Plan on swapping them every 20,000 miles (approx. 32,000 km) or so.
  • Rear Pads: Usually last longer, around 35,000 miles (approx. 56,000 km).
  • Brake Fluid: Flush and replace every 25,000 miles (approx. 40,000 km) or every 2 years, whichever comes first.

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