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 8 - Jul 13
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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
4.8 ★★★★★
Based on 2277 reviews
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Product Reviews
★★★★★ 5
Great privacy option for townhome deck!
Color: White, Size: 6 Panel, Color: White, Size: 6 Panel
Deck privacy! I wanted a way to add some privacy to my second floor townhome deck. It’s been holding up well and doesn’t look junky! I used zip ties on one end so I can open and close it as I wish. Great solution to living in close quarters to your neighbors! I purchased the six panel and it’s a perfect size
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
★★★★★ 4
Flimsy
Color: Beige, Size: 8 Panel
It’s thinner than what I thought and flimsy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 2, 2026
★★★★★ 5
Great room divider
Color: Black, Size: 4 Panel-88'', Color: Black, Size: 4 Panel-88''
This is a room divider and would work great as one! I’m using it as a cover for my car port/garage so you can’t look in and see my messy garage as easily and for what I’m using it for it’s a little not quite as sturdy as I need it to but I’m sure it’s not meant to be used outside anyways so I don’t fault the product since I’m not using it as intended… with that said though…. It still covers my garage beautifully and really does exactly what a I need it to! I’m sure the wind may blow it over if it gets too crazy but I don’t see it breaking by any means. The frame is metal and drilled together using long screws. It’s very well built. The cloth for the panels is this waterproof type material that’s kind of like the gazebo roof feeling. So it’s easy to clean and it’s easy to wipe. You can put it straight or bend the panels and either way it still stands up. You don’t HAVE to bend it to make it stand or anything. You can literally use it straight across like I am in the pictures. Overall very happy with this product and it’s also very tall so it truly covers a lot (hides a lot lol). I’m 5’8 so you can see it’s taller than me by the pic I took
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
★★★★★ 3
OK. Drag to setup. Needs more stable feet
Color: Black, Size: 4 Panel-88''
I was glad to find these.
The benefits of having them in a recording setup is helping suppressing noise for a vocal booth.
It's a layer that surrounds the recording box. Nice!
(But away from audio hardware or DAW).
Here is the not so nice part:
The feet!
It's able to stand (as it needs to do this). But it cannot be bumped. If it does, it's coming down onto something.
I believe the feet units are not wide enough (or long enough). That makes for an easier tumble risk. So far, they haven't, but it's like being in the woods over leaves - it feels dangerous with every step! (That's actually true).
They are tall enough, wide enough, material OK. But the feet for the main assembly do not seem sturdy enough.
There are ways to help that.
I'm thinking a 2x4 to augment the base. Make them wider. It can be done. It was a drag to set these up, and I'm sure to modify them like i'd want them. But, they do come in at a much lower price that other similar dividers.
Consider all this because I've seen more solid dividers ( with padding) that would basically be the 1/2 cost of these. But i'd think they'd be easier to assemble, stand sturdier, and without that feeling of an impending fall (or fail).
This is my opinion. I hope it helps.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
★★★★★ 1
wrong size of metal components. incorrect items. non functioning
Color: Black, Size: 4 Panel-88''
The owner of this product sent me the incorrect pieces when I tried to install. It didn’t fit. The pieces were missing holes and once I connected the wrong pieces after knowing now they’re stuck and I can’t return them even though Amazon was kind enough to refund me. I just want to warn people this product is such a disappointment because it looks good. It’s good price, but you can’t even assemble the thing very disappointed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
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