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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USA
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- USA
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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
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Description
Classic 8657S Front Wheel 6-Piston Big Brake KitClassic Series Front Axle 6 Piston Classic 8657S Front 6 Piston Big Brake Kit 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. Why Builders Choose the 8657S 6 Piston Forged Caliper Six
Classic Series · Front Axle · 6-Piston
Classic 8657S Front 6-Piston Big Brake Kit
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.
Why Builders Choose the 8657S
55.0 cm² Piston Area
55.0 cm² total piston area per caliper gives the 8657S strong clamp force with linear pedal response.
355–405 mm Two-Piece Rotors
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.
Two-Piece Forged Aluminum Body
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 Pistons
Heat-insulated two-piece pistons with dust boots slow heat transfer into the brake fluid, helping protect pedal feel during repeated stops.
Steel or CCB Rotor Options
Choose heat-treated high-carbon steel for predictable street and track-day use, or carbon-ceramic for lower rotating mass and higher thermal ceiling.
Technical Specifications & Kit Options
| 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.
Package List
Calipers ×2
Two front 6-piston forged calipers.
Brake Pads
Matched brake pad set for the selected rotor material.
Brake Rotors ×2
Two two-piece internally vented rotors with CNC aluminum hats.
Caliper Brackets ×2
Application-specific CNC carbon-steel mounting brackets.
Rotor Hats ×2
CNC aluminum rotor hats.
Brake Hoses ×2
Stainless-steel braided brake lines with vehicle-specific fittings.
Will It Fit? Your 3-Step Check
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.
1. Wheel Diameter
Minimum recommended wheel size is 18 inches.
2. Spoke Clearance
Minimum spoke clearance is 107 mm. Wheel offset, spoke profile, and rotor size all affect fitment.
3. Vehicle Model
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.
Installation & Break-In
- Radial mount with vehicle-specific brackets.
- Brake-line fittings are vehicle-specific on the caliper side and chassis side.
- Rotor size and mounting hardware must be confirmed for your specific vehicle.
- Proper bed-in is required to transfer an even pad layer to the rotor face.
- Bedding-in stabilizes friction and helps prevent judder.
- Follow the included procedure before any aggressive braking.
Frequently Asked Questions
Will the 8657S fit my vehicle?
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.
What wheel size do I need to clear the 6-piston caliper?
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.
Should I choose steel or carbon-ceramic (CCB) rotors?
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.
What rotor sizes are available?
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.
Is a bedding-in procedure required?
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.
What is included in the kit?
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.
Ready to spec your 8657S build?
Send your vehicle details, wheel specs, and intended use. We will confirm rotor size, mounting hardware, and brake-line fittings before you order.
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
4.6 ★★★★★
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Product Reviews
★★★★★ 5
This stuff works!
Size: 32 oz
I was sceptical but wanted to avoid replacing 2 rear tires on my zero turn mower. The tires were leaking air and had bad sidewall cracking. I found the use of the product to be easy and quick. I aired up the tires and rode around the yard a few minutes to distribute the product in the tires. It has been 4 days and both tires remain aired up. Previously both tires would already be flat within this timeframe. Excellent results for me!
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Reviewed in the United States on May 18, 2026
★★★★★ 1
Doesn’t work for a car Tire seal slow leak
Size: 16 oz
Does not work for a car tire. Had a slow rim seal leak. Out 32oz in still leaks the same. Do not buy. I got the one with fibers in it. It worked just fine. This does not work. Period. $30 wasted actually I purchased two so I wasted $60 when I could’ve bought probably a new tire
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Reviewed in the United States on April 8, 2026
★★★★★ 5
#1 Tire Repair
Size: 16 oz
This stuff is Fantastic. I have a riding lawn mower and one of the front tires, which is small, had been running low for a couple of years, we took it off. to fill it with the liquiTube and you could see cracks all around the outside of the tire. The liquid tube oozed out of one of the cracks and sealed , immediately. My brother rolled the tire around real good before we put it back on the track lawn mower. It has been 3 days now and today I mowed for 1 1/2 hrs and the tire as full as it was the day we put in the LiquiTube. This stuff is fantastic, it really, really works!
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Reviewed in the United States on May 31, 2026
★★★★★ 4
Awesome
Size: 32 oz
Works as advertised. Just don't scrimp... give it the full recommended amount in each tire
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Reviewed in the United States on May 27, 2026
★★★★★ 5
This tire sealant works very well
Size: 16 oz
So far so good.
Cheaper and easier that tubing a leaking tire
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Reviewed in the United States on May 24, 2026
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