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.
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Evolution Series · Front Axle · Platform-Adapted BBK
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.
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.
Two-piece pistons with dust boots reduce heat transfer into the brake fluid, helping protect pedal feel during aggressive or repeated braking.
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.
Choose heat-treated high-carbon cast iron rotors for street performance, or carbon-ceramic rotors for reduced unsprung mass and higher thermal ceiling.
| 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.
2 × EB4 forged 4-piston front calipers
1 set of front brake pads matched to selected rotor material
2 × Two-piece front rotors (Ø355 or Ø380 mm × 32 mm)
2 × CNC carbon-steel caliper mounting brackets
2 × CNC aluminum rotor hats
Stainless-steel braided brake lines with vehicle-specific fittings
Mounting hardware and bedding-in instructions are included.
Always verify spoke, barrel, and face clearance against your specific wheel before purchase. A clearance template is available on request.
18 in wheels or larger are recommended.
Minimum spoke clearance: 99 mm.
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.
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.
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.
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.
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.
Yes. Bedding-in is required to lay an even friction transfer layer onto the rotor. Skipping it causes uneven deposits, judder, and reduced bite.
Yes. Every kit ships with stainless-steel braided lines, CNC aluminum rotor hats, and CNC carbon-steel caliper brackets matched to your vehicle.
Need fitment confirmation, custom caliper color, or a non-listed rotor face pattern? Our team will spec the kit for your build.
Brake Kits · Fitment · Installation · Care Guide
A brake kit is not just a pair of larger calipers. Calipers, rotors, pads, hoses, brackets, rotor hats, mounting hardware, brake fluid, wheel clearance, and bedding procedure all work together as one system.
This guide explains how to confirm the right TTSPORT brake kit before ordering, what to check before installation, and how to care for the system after installation.
Do not order a brake kit by vehicle name alone. The correct kit depends on the vehicle, axle position, wheel package, driving use, and brake system layout.
Brake kits are application-specific. A visually similar kit can still have the wrong rotor offset, bracket geometry, hose fitting, caliper position, or wheel clearance requirement.
Different TTSPORT brake kit series use different hardware layouts. Always confirm what the kit includes before purchase.
Use direct-mount calipers and one-piece rotors where specified. These kits do not use rotor hats or caliper brackets unless the final product page clearly states otherwise.
Use separate friction rings and rotor hats. Hat offset, ring bolt pattern, hardware style, and rotor direction must be matched correctly.
May require bespoke brackets, rotor hats, brake lines, and engineering confirmation based on knuckle, hub, wheel, and competition use.
Require extra attention to wheel clearance, tire size, vehicle load, descent control, hose routing, and dust / water exposure.
Do not assume every brake kit includes the same parts. Package contents vary by product series, vehicle application, and final order configuration.
Before finalizing the order, review the kit specification carefully. Confirm the brake kit is matched to your vehicle and wheel setup, not only to the model name.
If any part is not listed in the final order or product page, do not assume it is included.
Inspect every component before installation. Do not modify, grind, drill, stretch, force, or space brake kit components to make them fit.
Safety: Brake kits affect braking force, hydraulic sealing, heat control, wheel clearance, and vehicle stability. Do not install the kit if fitment, torque, direction, clearance, or compatibility is unclear.
Correct installation is as important as the brake kit itself. A properly engineered kit can still perform poorly if installed with dirty mounting faces, incorrect torque, poor hose routing, or trapped air in the hydraulic system.
Verify caliper centering over the rotor and confirm even pad sweep across the friction surface.
Confirm left / right rotor direction if the rotor uses directional vanes or directional face pattern.
Check brake hose length and routing at full steering lock and full suspension travel. No twisting, rubbing, stretching, or kinking.
Check caliper-to-spoke and caliper-to-barrel clearance before road use. Wheel diameter alone is not enough.
Use the correct brake fluid type and bleed the system until pedal feel is firm and consistent.
Torque all brake hardware to the specified value. Do not reuse damaged, unknown, stretched, or corroded safety-critical fasteners.
Brake pads and rotors need a controlled bedding process before full performance is available. Bedding helps create an even transfer layer on the rotor surface, improving bite, pedal consistency, and vibration resistance.
Street pads, race pads, iron rotors, two-piece rotors, and carbon ceramic rotors may require different bedding procedures. Use the procedure supplied with the specific kit.
After installation and bedding, give the system a short break-in period before aggressive use. Pedal feel, pad contact, dust output, and noise may continue to settle after the first drives.
Brake kits need regular inspection, especially after track use, off-road use, towing, mountain driving, winter salt exposure, or any brake service.
Inspect pads, rotors, fluid level, and hose condition during normal service intervals. Prioritize quiet operation, smooth pedal feel, and even wear.
Check pad thickness, rotor surface condition, and fluid condition more often. Long descents create sustained heat even without track use.
Inspect for mud, sand, stone impact, hose abrasion, dust boot damage, and caliper contamination after trail use.
Inspect pads, rotors, fluid, and hardware before and after every event. Track heat shortens service intervals.
Check rear brake temperature, hydraulic handbrake behavior, pad wear, rotor cracking, and hardware condition frequently.
Use only compatible pads and approved bedding procedures. Inspect rotor surface condition carefully and avoid incompatible friction materials.
Do not continue driving if the brake system shows any of the following symptoms. Inspect the system or contact a qualified brake technician before using the vehicle again.
Send your vehicle details, brake kit series, wheel specs, driving use, photos, and any symptoms you notice. TTSPORT will help confirm fitment, installation checks, and the correct care path for your brake kit.
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