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 Series EP4S Rear Wheel 4-Pistons Brake Kit

$1,510.00 USD
$1,510.00 USD

Shipping costs not included

Caliper Color: Standard Color (As Shown in the Image)
Rotor Size: 345x28mm (Wheel ≥ 18″)
Rotor Material & Design: Steel - Curved Slotted
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 Series EP4S Rear Wheel 4-Pistons 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 Series EP4S Rear Wheel 4-Pistons 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
Specifications

The No-Compromise Rear Upgrade: EP4S Integrated EPB Caliper

Tired of rear brake "upgrades" that make you sacrifice your electronic parking brake? The EP4S is the solution you've been waiting for. This all-in-one caliper seamlessly integrates a powerful 4-piston hydraulic system for performance driving with a robust electronic parking brake (EPB) for OEM convenience.

Engineered to perfectly complement our front big brake kits, the EP4S restores critical brake balance for stable, predictable handling under heavy braking. Its lightweight forged body, two-piece ventilated pistons, and high-temp seals ensure it can handle extreme heat and deliver consistent, fade-free performance. Now you can get a complete, balanced big brake system without compromise.

Technical Specifications

Caliper
Series Evolution Series
Model EP4S
Mounting Position Rear
Number of Pistons 4 (Hydraulic) + 1 (EPB)
Piston Type Two-Piece Vented Pistons with Dust Boots
Piston Diameter 28 mm × 4, 27 mm × 1 (EPB)
Dimensions L 278 × W 202 × H 93 mm
Total Piston Area 26.44 cm² (Hydraulic)
Manufacturing Process Two-Piece Forged
Net Weight 4.50 kg (single caliper without pad)
Surface Finish High-Temperature Gloss Coating
Recommended Wheel Size 18″ or larger
Recommended Rotor Size ⌀345–380 mm / Thickness 28 mm
Brake Rotor
Material Heat-Treated High Carbon Steel Carbon-Ceramic Composite
Dimensions ⌀345 / 355 / 380 mm × 28 mm ⌀380 mm × 28 mm
Construction 2-Piece Rotor 2-Piece Rotor
Vented / Solid Vented Vented
Floating / Fixed Fixed Floating
Directional Yes Yes
Design Options Curved Slotted / GrainSlot / WaveSlot / Drilled & Slotted Cross Drilled
Brake Pad
Compatible Rotor Material Steel Rotors Carbon-Ceramic Rotors
Operating Temperature 0–550°C 0–700°C
Coefficient of Friction 0.40–0.46 μ 0.46 μ ± 0.15
Brake Hose
Construction 3-Layer Reinforced
Material Inner: PTFE (Teflon); Middle: SUS304 Braided Stainless Steel; Outer: PVC Sheath
Mounting Hardware
Rotor Hat CNC-Machined Aerospace-Grade Aluminum Alloy
Caliper Bracket CNC-Machined Carbon Steel

3-Step Pre-Fitment Check

Step 1: Illustration showing EP4S rear brake kit requires 18-inch or larger wheels.
Step 1: Verify Wheel Size (18" Minimum)
Step 2: Diagram showing how to measure caliper to wheel spoke clearance, minimum 97mm required for EP4S kit.
Step 2: Check Spoke Clearance (Min. 97 mm)
Step 3: Icon representing checking your vehicle's compatibility from a verified list.
Step 3: Confirm Your Vehicle Model Below

Vehicle Compatibility

Don't See Your Model? Our application list is constantly expanding. If your vehicle isn't on the list, just reach out! Provide your year, make, model, and wheel specs, and our team will confirm fitment options for you.

Frequently Asked Questions

How does the electronic parking brake (EPB) work?
The EP4S caliper has a built-in electric motor. When you press your car's parking brake button, the motor mechanically applies the brake pads, holding the car securely. It functions exactly like your factory system, just with much more performance.
Is this a "plug-and-play" installation?
Yes, the electronic part is 100% plug-and-play. The EPB motor uses an OEM-style connector that plugs directly into your car's existing harness. No cutting, splicing, or wiring is required. The rest of the kit installs just like a traditional big brake upgrade.
Why should I upgrade my rear brakes?
Upgrading your front brakes alone creates a heavy forward brake bias, which can make the car unstable during hard stops. Our EP4S rear kit is engineered to restore that crucial balance, ensuring your car brakes predictably and safely while maximizing the performance of your entire system.
Notice

Brake Kit Purchase Notice


  • Custom‑made products cannot be returned unless there is a genuine quality defect.
  • Spacer requirements vary depending on wheel design; we assist with fitment, but spacer‑related issues do not qualify for returns.

1. Disclaimer

  1. Please provide vehicle make, model year, VIN, and wheel size before ordering TTSPORT products.
  2. Confirm wheel measurements and submit photos as requested — TTSPORT is not liable for issues arising from incorrect specs.
  3. All products are inspected before shipping. Inspect upon delivery and report quality issues within 24 hours.

2. Initial Break‑In Procedure

  1. In a safe area, brake from 60 km/h to 10 km/h with moderate pressure—repeat 10 times.
  2. Drive 500–1,000 km with light to moderate usage before full braking performance. Avoid aggressive stops.
  3. Our high‑carbon steel discs have grooved, color‑treated surfaces to help quick bedding and resist corrosion.

3. Product Warranty

  • Calipers: 1‑year warranty on defects. Lifetime maintenance available (parts charged).
  • Discs & Hoses: 90‑day warranty for defects. Expected lifespan: 40,000–60,000 km.
  • Brake Pads: 90‑day coverage. Typical lifespan: 20,000–40,000 km.
  • Custom Hats/Brackets: Fit guaranteed; no warranty post-installation.

4. Usage & Maintenance

  1. Do not wash immediately after hard braking to prevent rotor warpage.
  2. Allow extra stopping distance when driving in wet conditions.
  3. If you experience unusual noise or vibration, consult your installer immediately.

Recommended service intervals:

  • Replace rotors when wear exceeds 3 mm.
  • Front pads: every 30,000 km.
  • Rear pads: every 50,000–60,000 km.
  • Brake fluid: every 40,000 km or every 2 years.

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