The J’S RACING B6P-D2 6-Pot Caliper Kit is a premium Japanese-made big brake kit (BBK) engineered specifically for the Honda Civic FD2 Type R (K20A).
Developed through Super Taikyu ST4 endurance racing, it is designed to deliver exceptional braking force, precise pedal modulation, and outstanding fade resistance for demanding circuit use while remaining suitable for spirited street driving.
Technical Specifications
- Vehicle: Honda Civic FD2 Type R
- Engine: K20A
- Caliper: Forged aluminum fixed 6-piston (staggered piston design)
- Rotor: 332 mm × 32 mm ventilated carbon-compound disc
- Bell Housing: Lightweight floating aluminum bell with hard anodized finish
- Brake Lines: Stainless steel braided hoses
- Pads: J’S Racing/Seidoya performance compound
- Required Wheel Size: 18-inch or larger (17-inch wheels generally will not clear the caliper).
Technical Analysis
1. Forged Monoblock Construction
Unlike cast calipers, the forged aluminum body offers:
- Higher structural rigidity
- Reduced caliper flex
- More consistent pedal feel
- Lower unsprung mass
Result:
- Sharper brake response
- Better steering precision under hard braking.
2. Six-Piston Layout
The staggered piston arrangement provides:
- Uniform brake pad pressure
- Reduced taper wear
- More stable rotor temperatures
- Linear braking characteristics
Compared with many 4-pot systems, it distributes clamping force more evenly across the pad surface.
3. 332 mm Floating Rotor
Advantages include:
- Higher thermal capacity
- Improved heat dissipation
- Reduced brake fade
- Lower chance of rotor cracking during repeated heavy braking
The floating bell also accommodates thermal expansion, helping maintain rotor stability.
4. Stainless Steel Brake Lines
Benefits:
- Reduced hose expansion
- Firmer pedal feel
- Better consistency during repeated hard stops.
Performance Advantages
Compared with OEM FD2 Brembos:
|
Feature |
OEM Brembo |
J’S Racing 6-Pot |
|
Brake Torque |
High |
Much higher |
|
Heat Capacity |
Good |
Excellent |
|
Fade Resistance |
Good |
Outstanding |
|
Pedal Modulation |
Good |
Excellent |
|
Track Endurance |
Moderate |
Professional-level |
|
Rotor Cooling |
Standard |
Racing optimized |
|
Serviceability |
Good |
Excellent (replacement rotors, pads, overhaul kits available)Â |
Advantages over Other Premium Brands
vs Brembo GT
J’S Racing
- Honda-specific engineering
- Excellent pedal modulation
- Proven in Japanese endurance racing
Brembo
- Broader vehicle compatibility
- Strong global motorsport heritage
vs AP Racing
AP Racing
- Benchmark for professional motorsport
- Exceptional thermal performance
J’S Racing
- Better optimized for Honda chassis geometry
- Excellent value for Honda enthusiasts
vs Endless
Endless emphasizes endurance and ultra-high-quality pad compounds.
J’S Racing offers:
- Comparable braking performance
- Honda-focused tuning
- Simpler installation on the FD2 platform
vs Spoon Monoblock
Spoon prioritizes lightweight construction and OEM-like pedal feel.
J’S Racing delivers:
- Greater outright stopping power
- Larger rotor diameter
- Better suited for high-horsepower or track-focused builds
Best Applications
★★★★★ Time Attack
★★★★★ Circuit Racing
★★★★★ Hill Climb
★★★★★ Fast Road Driving
★★★★☆ Daily Driving (with appropriate pad compound)
Potential Drawbacks
- High purchase cost
- Consumables are more expensive than OEM
- Increased brake dust and noise with aggressive pads
- Requires 18-inch or larger wheels
- Overkill for lightly modified daily-driven cars.
Ideal Supporting Upgrades
To maximize the kit’s potential:
- High-temperature DOT 4 or DOT 5.1 brake fluid
- Lightweight forged 18-inch wheels
- Performance tires (e.g. Michelin Pilot Sport Cup 2, Yokohama A052, Bridgestone RE-71RS)
- High-quality rear pads matched to the front bias
- Brake cooling ducts for repeated track sessions
Verdict
Rating: 9.8/10
The J’S RACING B6P-D2 is one of the finest Honda-specific big brake kits available. Rather than simply increasing piston count, it combines a rigid forged caliper, large floating rotors, optimized hydraulic balance, and race-proven development to deliver outstanding braking confidence and consistency.
For an FD2 Type R that sees frequent spirited driving or track use, it offers braking performance comparable to many elite European motorsport brake systems while remaining purpose-built for Honda dynamics.
