Forged 4-Piston Caliper
Two-piece forged aluminum body with staggered 40 mm and 44 mm pistons. Staggered bore sizing supports even pad loading and reduces taper wear over long stop sequences.
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 6 - Jul 11
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Evolution EB4 Front Wheel 4-Piston Big Brake KitEvolution Series Front Axle Platform Adapted BBK Evolution EB4 4 Piston Front Big Brake Kit The TTSPORT Evolution EB4 is a front 4 piston big brake kit for drivers who want a stronger, more controlled street and canyon brake package without stepping into an oversized race only system. Forged calipers, large two piece rotors, matched pads, and braided lines work together to deliver consistent bite, repeatable pedal feel, and improved heat management.
Evolution Series · Front Axle · Platform-Adapted BBK
Evolution EB4 4-Piston Front Big Brake Kit
The TTSPORT Evolution EB4 is a front 4-piston big brake kit for drivers who want a stronger, more controlled street and canyon brake package without stepping into an oversized race-only system. Forged calipers, large two-piece rotors, matched pads, and braided lines work together to deliver consistent bite, repeatable pedal feel, and improved heat management.
Why Builders Choose the EB4
Heat-Insulated Pistons
Two-piece pistons with dust boots reduce heat transfer into the brake fluid, helping protect pedal feel during aggressive or repeated braking.
Big Two-Piece Rotors
Ø355 mm or Ø380 mm × 32 mm internally vented rotors on CNC-machined aluminum hats. More mass and venting area than typical factory front rotors for greater thermal capacity.
Iron or Carbon-Ceramic
Choose heat-treated high-carbon cast iron rotors for street performance, or carbon-ceramic rotors for reduced unsprung mass and higher thermal ceiling.
Technical Specifications & Kit Options
| Brake Caliper | ||
|---|---|---|
| Series | Evolution Series | |
| Model / Application | EB4 | |
| Axle Position | Front | |
| Piston Count | 4-piston | |
| Piston Type | Two-piece heat-insulated pistons with dust boots | |
| Piston Diameter | 40 mm × 2 / 44 mm × 2 | |
| Total Piston Area | 55.5 cm² per caliper (all pistons combined) | |
| Caliper Dimensions | L 289 mm × W 151 mm × H 83 mm | |
| Manufacturing Process | Two-piece forged aluminum body | |
| Net Weight | 3.80 kg per caliper (without pads) | |
| Surface Finish | High-temperature gloss coating | |
| Recommended Wheel Size | 18 in or larger | |
| Recommended Rotor Size | Ø355–380 mm × 32 mm | |
| Brake Rotor Options | ||
| Rotor Option | Iron Rotor (Standard) | Carbon-Ceramic (Option B) |
| Rotor Material | Heat-treated high-carbon cast iron | Carbon-ceramic composite |
| Axle Position | Front | Front |
| Rotor Dimensions | Ø355 / 380 mm × 32 mm | Ø355 / 380 mm × 32 mm |
| Construction | Two-piece assembly | Two-piece assembly |
| Ventilation | Internally vented | Internally vented |
| Rotor Mounting | Fixed or floating (depends on size & application) | Floating |
| Directional Design | Yes — left/right specific | Yes — left/right specific |
| Rotor Face Pattern | Curved slot / Grain slot / Wave slot / Drilled & slotted | Cross-drilled |
| Brake Pad Options | ||
| Pad Option | For Iron Rotors | For Carbon-Ceramic Rotors |
| Compatible Rotor Material | Iron / steel rotors only | Carbon-ceramic rotors only |
| Operating Temperature Range | 0–600 °C | 0–700 °C |
| Average Friction Coefficient | μ ≈ 0.38 | μ ≈ 0.45 |
| Lines | ||
| Brake Line Construction | Three-layer construction | |
| Brake Line Material | PTFE inner liner / SUS304 stainless braid / PVC protective outer sheath | |
| Brake Line Fittings | Vehicle-specific fittings on caliper and chassis sides | |
| Brackets | ||
| Rotor Hat Manufacturing Process | CNC-machined | |
| Rotor Hat Material | High-strength aluminum alloy | |
| Caliper Bracket Manufacturing Process | CNC-machined | |
| Caliper Bracket Material | Carbon steel | |
| Caliper Mounting Type | Radial mount with vehicle-specific brackets | |
| Fitment & Installation | ||
| Minimum Spoke Clearance | 99 mm | |
| Recommended Wheel Size | 18 in or larger | |
| Brake-Line Fittings | Vary by application, caliper-side and chassis-side | |
| Bedding-In Procedure | Required before aggressive driving | |
Friction coefficient varies with temperature, line pressure, and rotor condition. Pad and rotor materials must match — never run iron-spec pads on carbon-ceramic rotors or vice versa.
Package List
Calipers ×2
2 × EB4 forged 4-piston front calipers
Brake Pads
1 set of front brake pads matched to selected rotor material
Brake Rotors ×2
2 × Two-piece front rotors (Ø355 or Ø380 mm × 32 mm)
Caliper Brackets ×2
2 × CNC carbon-steel caliper mounting brackets
Rotor Hats ×2
2 × CNC aluminum rotor hats
Brake Hoses ×2
Stainless-steel braided brake lines with vehicle-specific fittings
Mounting hardware and bedding-in instructions are included.
Will It Fit? Your 3-Step Check
Always verify spoke, barrel, and face clearance against your specific wheel before purchase. A clearance template is available on request.
1. Wheel Diameter
18 in wheels or larger are recommended.
2. Spoke Clearance
Minimum spoke clearance: 99 mm.
3. Vehicle Model
The EB4 is a platform-adapted big brake kit. Caliper brackets, rotor hats, and brake-line fittings are built per vehicle application.
Wheel barrel and face shape also matter — verify with a clearance template before installing.
Installation & Break-In
- Caliper mount: Radial mount with vehicle-specific brackets.
- Brake-line fittings vary by application, including caliper-side and chassis-side fittings.
- Mounting hardware and bedding-in instructions are included.
- A proper bedding-in procedure is required to transfer an even pad layer onto the rotor face.
- Skipping bed-in commonly causes uneven deposits, vibration, and reduced bite.
- Follow the included bedding instructions before any aggressive driving.
Frequently Asked Questions
Will the EB4 fit my car?
The EB4 is a platform-adapted big brake kit. Caliper brackets, rotor hats, and brake-line fittings are built per vehicle application. Send your year, make, model, trim, and wheel specs through our contact page so we can confirm fitment before order.
What wheel size do I need?
18 in wheels or larger are recommended, with at least 99 mm spoke clearance. Wheel barrel and face shape also matter — verify with a clearance template before installing.
Should I choose 355 mm or 380 mm rotors?
355 mm offers a strong upgrade over most factory front brakes with lower rotational mass. 380 mm gives more thermal capacity and torque for heavier vehicles or harder use, when wheel clearance allows.
Iron rotors or carbon-ceramic?
Heat-treated high-carbon iron rotors are the right choice for most street and spirited driving. Carbon-ceramic reduces unsprung mass and raises the thermal ceiling, but costs more and requires matching CCB-specific pads.
Do I need to bed in the pads?
Yes. Bedding-in is required to lay an even friction transfer layer onto the rotor. Skipping it causes uneven deposits, judder, and reduced bite.
Are braided lines and brackets included?
Yes. Every kit ships with stainless-steel braided lines, CNC aluminum rotor hats, and CNC carbon-steel caliper brackets matched to your vehicle.
Ready to spec your EB4 build?
Need fitment confirmation, custom caliper color, or a non-listed rotor face pattern? Our team will spec the kit for your build.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 972 reviews
Sort
Product Reviews
★★★★★ 4
Husband loves socks
Number of Items: 6, Color: Black (6-pairs), Size: Large
Socks are very comfortable and soft. He got rid of the other ones he had! Also, it was a great price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 9, 2024
★★★★★ 5
Good product
Number of Items: 6, Color: Black (6-pairs), Size: Large
Good fit, item as advertised!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
★★★★★ 5
Great socks
Number of Items: 6, Color: Black (6-pairs), Size: Medium
I love these socks
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
★★★★★ 5
Good socks
Number of Items: 6, Color: White (6-pairs), Size: X-Large
I have size 13 feet and these are great maybe they’ll stretch and be a bit big but I m fine with that
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
★★★★★ 5
Well made socks
Number of Items: 6, Color: Black (6-pairs), Size: X-Large
Made well. Bought for my Son. He only likes Under Armour brand of socks. Only socks he buys.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026