6-Piston Forged Caliper
Six forged pistons per caliper in a staggered 30 / 34 / 38 mm layout balance pad pressure from leading to trailing edge.
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Classic Series · Front Axle · 6-Piston
The TTSPORT Classic 8657S is a front 6-piston big brake kit built around a two-piece forged aluminum caliper, staggered pistons, and two-piece internally vented rotors. It targets drivers who want stronger thermal capacity, sharper pedal modulation, and repeatable stops without moving into a pure race-only setup.
Six forged pistons per caliper in a staggered 30 / 34 / 38 mm layout balance pad pressure from leading to trailing edge.
55.0 cm² total piston area per caliper gives the 8657S strong clamp force with linear pedal response.
Two-piece internally vented rotors range from Ø355 mm × 32 mm to Ø405 mm × 34 mm for street, track-day, and high-speed braking setups.
The 8657S caliper uses a two-piece forged aluminum body for stiffness under load, with 4.05 kg caliper net weight without pads.
Heat-insulated two-piece pistons with dust boots slow heat transfer into the brake fluid, helping protect pedal feel during repeated stops.
Choose heat-treated high-carbon steel for predictable street and track-day use, or carbon-ceramic for lower rotating mass and higher thermal ceiling.
| Brake Caliper | ||
|---|---|---|
| Series | Classic Series | |
| Model / Application | 8657S | |
| Axle Position | Front | |
| Piston Count | 6-piston | |
| Piston Type | Two-piece heat-insulated pistons with dust boots | |
| Piston Diameter | 30 mm × 2 / 34 mm × 2 / 38 mm × 2 | |
| Caliper Dimensions | L 350 mm × W 165 mm × H 92.64 mm | |
| Total Piston Area | 55.0 cm² per caliper | |
| Manufacturing Process | Two-piece forged aluminum body | |
| Net Weight | 4.05 kg per caliper (without pads) | |
| Surface Finish | High-temperature gloss coating | |
| Recommended Wheel Size | 18 in or larger | |
| Recommended Rotor Size | Ø355–405 mm × 32–34 mm | |
| Brake Rotor Options | ||
| Rotor Option | Steel / Option A | CCB / Option B |
| Rotor Material | Heat-treated high-carbon cast iron | Carbon-ceramic composite |
| Axle Position | Front | Front |
| Rotor Dimensions | Ø355×32 / Ø380×34 / Ø405×34 mm | Ø355×32 / Ø380×34 / Ø405×34 mm |
| Construction | Two-piece | Two-piece |
| Ventilation | Internally vented | Internally vented |
| Rotor Mounting | Fixed or floating, size/application dependent | Floating |
| Directional Design | Yes — left/right specific | Yes — left/right specific |
| Rotor Face Pattern | Curved / Grain / Wave slot or Drilled & Slotted | Cross-drilled |
| Brake Pad Options | ||
| Pad Option | Steel Pad | CCB Pad |
| 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, varies with temp / pressure / rotor | μ 0.45, varies with temp / pressure / rotor |
| Lines | ||
| Brake Line Construction | Three-layer construction | |
| Brake Line Material | PTFE inner / SUS304 stainless braid / PVC outer | |
| Brake Line Fittings | Vehicle-specific, caliper- and chassis-side | |
| 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 | 107 mm | |
| Recommended Wheel Size | 18 in or larger | |
| Rotor Diameter Selection | 355, 380, or 405 mm, selected according to vehicle application and wheel clearance | |
| Bedding-In Procedure | Required | |
Pads are rotor-specific. Iron/steel pads run on steel rotors; CCB pads run on carbon-ceramic rotors only. Do not cross-mount.
Two front 6-piston forged calipers.
Matched brake pad set for the selected rotor material.
Two two-piece internally vented rotors with CNC aluminum hats.
Application-specific CNC carbon-steel mounting brackets.
CNC aluminum rotor hats.
Stainless-steel braided brake lines with vehicle-specific fittings.
The 8657S is a platform-adapted front big brake kit. Caliper brackets, rotor size, and brake-line fittings are built to your specific vehicle. Before ordering, confirm wheel inner-barrel clearance, spoke profile, wheel offset, and rotor diameter against your current setup.
Minimum recommended wheel size is 18 inches.
Minimum spoke clearance is 107 mm. Wheel offset, spoke profile, and rotor size all affect fitment.
Confirm your year, make, model, and wheel specs so the correct caliper brackets, rotor size, and brake-line fittings can be selected.
We recommend a clearance check or template fit before installation.
This is a platform-adapted big brake kit. Caliper brackets, brake-line fittings, rotor size, and wheel clearance must be confirmed for your specific car before ordering. Contact us with your year, make, model, and wheel specs and we will confirm the correct configuration.
Minimum recommended wheel size is 18 inches, with at least 107 mm of spoke clearance. Wheel offset, spoke profile, and rotor size all affect fitment, so we recommend a clearance check or template fit before installation.
Heat-treated high-carbon steel rotors offer strong thermal capacity, predictable feel, and lower replacement cost for street and track-day use. CCB rotors cut rotating mass, raise the operating ceiling to ~700 °C, and pair with a higher-friction pad (avg μ 0.45) for repeated high-speed stops. Pads are not cross-compatible between the two rotor types.
The 8657S supports Ø355 mm × 32 mm, Ø380 mm × 34 mm, and Ø405 mm × 34 mm two-piece internally vented rotors. Larger diameters add thermal capacity and leverage but require more wheel clearance.
Yes. Proper bed-in is required to transfer an even pad layer to the rotor face, stabilize friction, and prevent judder. Follow the included procedure before any aggressive braking.
Two front 6-piston forged calipers, two two-piece internally vented rotors with CNC aluminum hats, application-specific CNC carbon-steel mounting brackets, stainless-steel braided brake lines with vehicle-specific fittings, and a matched brake pad set for the selected rotor material.
Send your vehicle details, wheel specs, and intended use. We will confirm rotor size, mounting hardware, and brake-line fittings before you order.
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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