2025-2026+ Tesla Model Y (Juniper Refresh) CCB Big Brake Kit | TTSPORT 8657 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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2025-2026+ Tesla Model Y / Performance (Juniper Refresh) CCB Big Brake Kit — TTSPORT 8657 6-Piston Caliper Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup
The 2025-2026+ Tesla Model Y Performance Juniper has enough mass and acceleration to overwork the factory iron-brake package when repeated high-speed stops, mountain driving, or track sessions exceed what regenerative braking can cover. This StopFlex kit replaces the stock friction hardware with 380mm carbon-ceramic rotors, a TTSPORT 8657 6-Piston Caliper front setup, and TTSPORT EP4 4-Piston Caliper with EPB rear hardware for more thermal capacity, lower brake dust, and reduced rotating mass. Fitment is engineered to the confirmed Juniper Performance trim, including bracket geometry, rotor-hat offset, caliper mounting, brake lines, and wheel clearance rather than assumed from the Model Y platform.
- 380mm front and rear carbon-ceramic rotors require 19-inch or larger wheels; spoke clearance must still be checked against the TTSPORT 8657 and EP4 caliper profiles.
- The front axle uses the TTSPORT 8657 6-Piston Caliper to increase clamp control and pad support on a heavy dual-motor EV that can generate repeated high-energy stops.
- The rear axle uses the TTSPORT EP4 4-Piston Caliper with EPB so the Model Y keeps electronic parking-brake functionality while adding matched rear thermal capacity.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Tesla Model Y / Performance (Juniper Refresh) |
| Model years | 2025-2026+ |
| Front setup | TTSPORT 8657 6-Piston Caliper / 380mm |
| Rear setup | TTSPORT EP4 4-Piston Caliper with EPB / 380mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 19" (for the 380 mm front rotor) |
Every StopFlex kit is bespoke-engineered for your exact model and trim — the brackets, rotor-hat offsets, and caliper mounting are matched to your specific car, not assumed from the platform. This matters because trims that share a chassis name can differ mechanically: a pure M or performance variant often carries different front knuckles/uprights, hub geometry, and wheel axial (ET) clearance than the standard models in the same family, so a bracket and hat offset that bolt onto one are not the same parts that fit the other. StopFlex supplies the calipers, pads, rotor hats, floating hardware, and brake lines as a matched system built to your confirmed trim. Cars with modified knuckles, modified uprights, or non-factory suspension mounting points must be reviewed before ordering and are not treated as direct-fit.
This setup uses a 380 mm front rotor, so the minimum wheel size is 19". Wheels under 19" will not clear the caliper and rotor, and spoke profile and offset affect clearance too — confirm your exact wheels before ordering.
| Wheel Size (Standard) | Disc Range |
|---|---|
| 15" | 260 mm – 285 mm |
| 16" | 285 mm – 300 mm |
| 17" | 300 mm – 330 mm |
| 18" | 330 mm – 355 mm |
| 19" | 355 mm – 380 mm |
| 20" | 380 mm – 400 mm |
| 21" | 400 mm – 420 mm |
| 22" | 420 mm – 440 mm |
Caliper Overview — Front & Rear Balance
Front Caliper (Primary Upgrade)
The front axle uses the TTSPORT 8657 6-Piston Caliper, giving the 380mm carbon-ceramic rotor a wide, evenly supported pad footprint for stable clamping force and a firmer pedal response under repeated braking. TTSPORT is a dedicated performance brake manufacturer, and this caliper is selected for its rigid multi-piston construction and suitability for big-rotor carbon-ceramic conversions on heavy modern EV platforms. StopFlex matches the caliper brackets, rotor-hat offset, and line routing to the confirmed 2025-2026+ Model Y Performance Juniper trim before production.
Rear Caliper (Balance)
The rear axle uses the TTSPORT EP4 4-Piston Caliper with EPB to add rear-axle brake torque and heat capacity without deleting the Model Y’s electronic parking brake. Its hydraulic service pistons handle braking while the dedicated EPB actuator preserves the factory parking-brake function.
Front & rear, engineered together: This kit is engineered as a front-and-rear system so the TTSPORT 8657 front calipers and TTSPORT EP4 rear calipers work with matched 380mm carbon-ceramic rotors instead of leaving the rear axle thermally and mechanically behind a front-only upgrade. The EP4 architecture uses four hydraulic service pistons plus one EPB actuator piston, allowing the rear axle to contribute real braking capacity while retaining OE-style parking-brake convenience.
Make It Yours — Color & Logo Customization
Every StopFlex kit-upgrade order can be finished with custom caliper colors, a custom caliper logo, and custom rotor hat colors, so the brake package matches your exact build instead of a fixed off-the-shelf look.
- Custom caliper color
- Custom caliper logo
- Custom rotor hat color
Why StopFlex CCB
Lower Unsprung Mass
StopFlex carbon-ceramic rotors are engineered to reduce rotor mass versus comparable iron discs, helping the suspension react cleaner and the steering feel more precise.
High-Temperature Stability
The carbon-silicon-carbide matrix is built for stable braking behavior at temperatures that can push iron rotors into heavy fade.
Rust-Free Rotor Surface
Carbon ceramic does not form orange flash rust after rain, washing, or storage, keeping the visible rotor face cleaner behind open wheels.
Long Street-Service Potential
In normal road use with matched pads and proper bedding, StopFlex CCB rotors are designed for far longer service life than typical iron replacement rotors.
Low Visible Dust
When paired with matched StopFlex pads, the system produces very low visible brake dust compared with conventional iron rotor and pad combinations.
Premium Ceramic-Glaze Appearance
StopFlex's proprietary coating creates a bright, high-end ceramic-glaze finish with subtle glaze texture and a more premium visual character behind open wheels.
Street-Usable Cold Bite
Street Spec and Track-Day Spec rotors are designed for normal first-stop road use, including cold-weather operation. Motorsport Spec is the competition-focused exception.
Continuous Fiber Reinforcement
Long-fiber carbon ceramic construction improves structural strength and thermal durability versus chopped-fiber approaches.
Heat Management Note
Carbon ceramic rotors tolerate extreme surface temperature, but they do not remove every heat-management requirement. During repeated hard stops, heat can still soak into pads, fluid, seals, calipers, wheels, and nearby components. For long track sessions, mountain descents, or sustained aggressive driving, brake cooling and high-temperature fluid are still recommended.
Street / Track-Day / Motorsport Rotor Options
Street Spec
Ceramic coating, cross-drilled face, and large cooling channels.
Best for daily driving and premium street builds that need clean cold bite, low dust, corrosion-free appearance, and long service life.
Track-Day Spec
Ceramic coating, blank face, and honeycomb cooling channels.
Best for fast-road and track-day use where repeated braking stability matters more than maximum visual drilling style.
Motorsport Spec
Uncoated blank face with honeycomb cooling channels.
Best for race-focused builds that run competition pads, high-temperature fluid, cooling strategy, and a proper warm-up window. Not the default street choice.
Package Scope
| Item | Details |
|---|---|
| Front calipers | TTSPORT 8657 6-Piston Caliper |
| Front CCB rotors | 380mm |
| Rear calipers | TTSPORT EP4 4-Piston Caliper with EPB |
| Rear CCB rotors | 380mm |
| CCB brake pads | Matched for the supplied StopFlex carbon ceramic rotors |
| Rotor hats and floating hardware | Vehicle-specific hardware package |
| Brake lines | Included for complete kit-upgrade orders |
| Color customization | Custom caliper colors, a custom caliper logo, and custom rotor hat colors are available for every kit-upgrade order. |
| Order scope | Default listing is full-car set when front and rear are specified. Front-only or rear-only orders can be arranged after confirmation. |
EPB & Rear Caliper Options
This vehicle leaves the factory with an electronic parking brake (EPB) built into the rear brake, so the rear of the kit is built to keep that EPB working. There are two rear paths. The first is a dual-caliper rear: a main performance caliper handles braking while a dedicated EPB actuator caliper is retained alongside it, so the electronic parking brake, auto-hold, and hill-start assist all keep working; on this path the rear performance caliper can be the TTSPORT EP4 / EP4S 4-piston caliper. The second is an EPB-integrated caliper, a single rear caliper with the electromechanical parking-brake motor built in for a cleaner install with fewer parts behind the wheel; on this path the rear is the TTSPORT EP4 / EP4S 4-piston caliper with integrated EPB. Which path fits best depends on your exact trim and EPB configuration, your budget, your appearance preference, and your wheel size and spoke clearance. Confirm your car's rear-brake configuration with StopFlex before ordering so the correct EPB-compatible rear option is built for your kit.
| Rear option | What it is | Rear caliper | Best when |
|---|---|---|---|
| Dual caliper (EPB retained) | Performance caliper plus a dedicated EPB actuator caliper, both fitted on the rear, so the factory electronic parking brake keeps working. | TTSPORT EP4 / EP4S 4-Piston Caliper | You want guaranteed factory EPB, auto-hold, and hill-start behavior preserved. |
| EPB-integrated caliper | A single rear caliper with the electromechanical parking-brake motor built in, for a cleaner install with fewer parts behind the wheel. | TTSPORT EP4 / EP4S 4-Piston Caliper with integrated EPB | You want a cleaner single-caliper rear with full EPB function. |
TTSPORT EP4S rear caliper specification (the EP4 shares the same engineering, slightly more compact):
| Specification | EP4S |
|---|---|
| Axle position | Rear |
| Piston count | 4 hydraulic + 1 EPB actuator |
| Piston type | Two-piece heat-insulated, dust boots + EPB actuator |
| Piston diameter | 28 mm × 4 / 27 mm × 1 |
| Total piston area | 30.4 cm² per caliper |
| Manufacturing process | Two-piece forged aluminum body |
| Net weight | 4.50 kg per caliper (no pads) |
| Surface finish | High-temperature gloss coating |
| Recommended wheel size | 18 in or larger |
FAQ
Will this kit fit every 2025-2026+ Model Y Juniper?
No. StopFlex builds this kit for the customer’s confirmed Model Y Performance Juniper trim, not as a generic Model Y platform part. Brackets, rotor-hat offsets, caliper mounting, brake lines, and clearance checks are matched to the exact vehicle before production.
What wheel size is required for the 380mm setup?
The largest rotor in this kit is 380mm, so wheels smaller than 19 inches will not clear it. A 19-inch or larger wheel is required, and spoke clearance must also be checked against the TTSPORT 8657 front caliper and TTSPORT EP4 rear caliper.
Will the electronic parking brake still work?
Yes. The rear axle uses the TTSPORT EP4 4-Piston Caliper with EPB, which combines hydraulic service pistons for braking with a dedicated EPB actuator so the Model Y retains electronic parking-brake operation.
Why choose carbon-ceramic brakes on a Model Y Performance Juniper?
Carbon-ceramic rotors reduce brake dust and rotating mass compared with iron while improving heat capacity for repeated high-speed stops that regenerative braking cannot absorb. This matters on a heavy, quick EV used for mountain roads, track events, or repeated highway braking.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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