Slim 8-Piston Architecture
Narrow caliper body (128 mm wide) helps preserve wheel clearance while running a true monobloc-style 8-pot design.
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Description
Slim SL8 Front Wheel 8-Piston Big Brake KitSlim Series Front Axle 8 Piston Slim SL8 Front 8 Piston Big Brake Kit The TTSPORT Slim SL8 is an 8 piston front big brake kit built around a narrow two piece forged aluminum caliper. It pairs a staggered 28 32 mm piston layout with two piece 380405 mm rotors to deliver high thermal capacity, firm pedal modulation, and repeatable stops behind 19 in or larger wheels. Why Builders Choose the SL8 Slim 8 Piston Architecture Narrow caliper body (128 mm
Slim Series · Front Axle · 8-Piston
Slim SL8 Front 8-Piston Big Brake Kit
The TTSPORT Slim SL8 is an 8-piston front big brake kit built around a narrow two-piece forged aluminum caliper. It pairs a staggered 28/32 mm piston layout with two-piece 380–405 mm rotors to deliver high thermal capacity, firm pedal modulation, and repeatable stops behind 19 in or larger wheels.
Why Builders Choose the SL8
Staggered Piston Bore
28 mm × 4 leading and 32 mm × 4 trailing pistons spread clamp load evenly across the pad for stable bite and reduced taper wear.
Two-Piece Forged Aluminum Body
Higher stiffness-to-weight than cast calipers; 5.20 kg per caliper without pads.
Heat-Insulated Pistons
One-piece heat-insulated pistons with dust boots limit fluid heat soak during back-to-back stops and protect seals from grit.
Two-Piece 380 / 405 mm Rotors
Internally vented, left/right directional, with iron/steel or carbon-ceramic options for street and track-day duty.
Technical Specifications & Kit Options
| Brake Caliper | ||
|---|---|---|
| Series | Slim Series | |
| Model / Application | SL8 | |
| Axle Position | Front | |
| Piston Count | 8-piston | |
| Piston Type | One-piece heat-insulated pistons with dust boots | |
| Piston Diameter | 28 mm × 4 / 32 mm × 4 | |
| Total Piston Area | 56.8 cm² per caliper (all pistons combined) | |
| Caliper Dimensions | L 391 mm × W 128 mm × H 144 mm | |
| Manufacturing Process | Two-piece forged aluminum body | |
| Net Weight | 5.20 kg per caliper, without pads | |
| Surface Finish | High-temperature gloss coating | |
| Recommended Wheel Size | 19 in or larger | |
| Recommended Rotor Size | Ø380–405 mm × 34 mm | |
| Brake Rotor Options | ||
| Rotor Option | Iron / Steel Rotor | Carbon-Ceramic Rotor |
| Rotor Material | Heat-treated high-carbon cast iron | Carbon-ceramic composite |
| Axle Position | Front | Front |
| Rotor Dimensions | Ø380 / 405 mm × 34 mm | Ø380 / 405 mm × 34 mm |
| Construction | Two-piece assembly | Two-piece assembly |
| 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 slot / Grain slot / Wave slot / Drilled-and-slotted | Cross-drilled |
| Brake Pad Options | ||
| Pad Option | For Iron / Steel Rotors | For Carbon-Ceramic Rotors |
| Compatible Rotor Material | Iron / steel only | Carbon-ceramic 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 Function | Reduces line expansion under pressure for a firmer pedal | |
| Brake Line Fittings | Vehicle-specific on both 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 | 90 mm | |
| Recommended Wheel Size | 19 in or larger | |
| Rotor Diameter Selection | 380 or 405 mm, selected according to vehicle application and wheel clearance | |
| Bedding-In Procedure | Required before normal use | |
Iron/steel rotors suit aggressive street and track-day use. Carbon-ceramic rotors reduce unsprung mass and resist fade in extended high-temperature work. Friction values vary with temperature, line pressure, and rotor condition. Pad and rotor materials must be matched — never run iron-rotor pads on a carbon-ceramic disc.
Package List
Calipers ×2
Two SL8 8-piston front calipers.
Brake Pads
Matched brake pads for both front calipers.
Brake Rotors ×2
Two-piece rotors in your selected size and material.
Caliper Brackets ×2
CNC-machined carbon steel brackets sized for radial-mount installation on the matched chassis.
Rotor Hats ×2
CNC-machined high-strength aluminum alloy rotor hats.
Brake Hoses ×2
Stainless-steel braided brake lines with vehicle-specific fittings.
Will It Fit? Your 3-Step Check
Wheel fitment is not universal. Always verify spoke clearance, caliper window depth, and wheel offset against the supplied caliper dimensions (391 × 128 × 144 mm) before ordering. Send wheel specs and your vehicle details to our team for a clearance check.
1. Wheel Diameter
19 in or larger wheels are required.
2. Spoke Clearance
The SL8 requires a minimum 90 mm spoke clearance.
3. Vehicle Model
The SL8 is a platform-adapted big brake kit. Confirm your year, make, model, and wheel specs with our team so we can ship the correct bracket and line set.
Installation & Break-In
- Installation should be performed by a qualified brake technician.
- Caliper mounting uses radial mount with vehicle-specific brackets.
- Brake line fittings are vehicle-specific on both caliper and chassis sides.
- A proper bedding-in procedure is required to transfer pad material to the rotor face and stabilize friction before normal use.
- Skipping bedding-in can cause uneven friction, vibration, and reduced bite.
- Pad and rotor materials must always be matched.
Frequently Asked Questions
What wheel size do I need to clear the SL8 caliper?
19 in or larger wheels are required, with a minimum 90 mm spoke clearance. The slim 128 mm caliper width helps, but every wheel design is different — verify clearance before ordering.
Why does the SL8 use staggered 28 / 32 mm pistons?
Smaller leading pistons and larger trailing pistons spread clamp force more evenly across the pad. This reduces tapered pad wear and gives more linear pedal modulation under repeated braking.
Should I choose iron/steel or carbon-ceramic rotors?
Iron/steel rotors offer strong bite, excellent value, and hold up to aggressive street and track-day use. Carbon-ceramic rotors cut unsprung weight, resist fade longer at extreme temperatures, and last significantly longer — at a higher price point.
Is this kit a direct bolt-on for my car?
The SL8 is a platform-adapted big brake kit. Calipers, brackets, and brake-line fittings are matched to your specific vehicle. Confirm your year, make, model, and wheel specs with our team so we can ship the correct bracket and line set.
What pads ship with the kit?
Pads are matched to your rotor choice. Iron/steel rotors use a 0–600 °C pad with μ ≈ 0.38. Carbon-ceramic rotors use a CCB-specific pad rated 0–700 °C with μ ≈ 0.45. Pad and rotor materials must always be matched.
Do I need to bed-in the brakes?
Yes. A proper bedding-in procedure is required to deposit an even pad transfer layer on the rotor face. Skipping it can cause uneven friction, vibration, and reduced bite.
Ready to spec your SL8 build?
Send your vehicle, wheel specs, and rotor preference. We'll confirm clearance and the correct bracket/line set before the kit ships.
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
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