Dixcel Specom B rear brake pads are built for serious circuit use, endurance racing, and high-load competitive environments. Designed to suit AP Racing CP9449, CP9450, and CP9451 calipers (D42), these pads are developed from compounds proven in domestic endurance series and offer exceptional wear resistance and stable performance throughout long sessions.
With flat, predictable μ characteristics and consistent pedal feel even under prolonged heat cycles, Specom B delivers the confidence required for setting repeatable lap times. This compound is ideal for rear applications where control, balance, and heat management are critical.
Key Features
- Race-focused carbon semi-metal compound
- Outstanding wear resistance for endurance applications
- Flat μ profile for smooth modulation and control
- Consistent performance from initial stop to extended lapping
- Effective temperature range: 200–900 °C
- Initial μ: 0.48 / Average μ: 0.40–0.43
- No wear sensor (not supported due to high-temp conditions)
Caliper Compatibility
- AP Racing CP9449
- AP Racing CP9450
- AP Racing CP9451
- Pad Profile: D42
Important: Specom B is a motorsport-only compound and not suitable for street use. Proper bedding and heat cycling are required for optimal performance.
Pad Shape
No instructions available for this product.
Product Comparison
Select up to two products below to compare their technical specifications side-by-side.
Premium Type
Excellent braking power and dust reduction for European applications.
EC Type
Improved effectiveness and reduced dust. Perfect for JDM city driving.
M Type
Ultra-low dust pad for clean wheels without sacrificing stopping power.
X Type
High stopping power for heavy SUVs. Effective with large diameter wheels.
ES Type
Entry-level sports pad with increased heat resistance and stable braking.
S Type
Street Sports pad ideal for lightweight vehicles. Firm rigid pedal touch.
Z Type
All-round performance. Best match for high grip radial tyres.
RE Type
ABS-compatible racing pad. Minimises ABS intervention for high-grip tyres.
RA Type
Racing pads pursuing high effectiveness and linear control for high-powered cars.
Specom-β
Endurance racing pad with exceptionally high wear resistance and stability.
Pad Specifications
| Feature | Pad A | Pad B |
|---|---|---|
| Intended Use | – | – |
| Target Vehicle | – | – |
| Friction Material | – | – |
| Bite Coefficient (µ) | – | – |
| Initial Bite Feel | – | – |
| Operating Temp | – | – |
| Dust Level | – | – |
| Rotor Wear | – | – |
| Tyre Match | – | – |
| Hardware Included | – | – |
* "YES*" denotes wear sensors are included on primary street applications where applicable. Track-only pads omit sensors due to extreme temperatures.
PD Type
Standard replacement rotor with factory-beating precision and anti-rust coating.
SD Type
Up to 20% more braking power with 6 offset slits for enhanced street and sports driving.
FP Type
Professional plain rotor with advanced heat treatment and 20% more carbon for ultimate crack resistance.
FS Type
The ultimate slotted racing rotor, combining high-carbon durability with enhanced initial bite.
2-Piece Assembly
Floating 2-piece structure prevents thermal judder, cuts weight, and allows outer ring replacement.
Rotor Specifications
| Feature | Rotor A | Rotor B |
|---|---|---|
| Intended Use | – | – |
| Target Stage | – | – |
| Material Structure | – | – |
| Surface Design | – | – |
| Anti-Rust Coating | – | – |
| Heat Treatment | – | – |
| Hub Structure | – | – |
| Key Benefit | – | – |
* Anti-rust coatings inhibit rust but do not completely prevent it on cast iron. Black finishing on 2-piece rotors wears to bare iron on the pad contact surface.
* Note: PD and SD type rotors may feature High Carbon (HC) material depending on the specific car model application.
FAQ
DIXCEL Brake Pads – Frequently Asked Questions
DIXCEL pads are engineered in Japan to provide improved stopping power, stronger pedal feel, heat resistance and long-term durability. They offer a more controlled braking feel than OEM pads, especially under repeated braking.
- EC Type: Daily street use – quiet & comfortable.
- Premium Type: OEM-plus upgrade for comfort & usability.
- M Type: Ultra-low dust – keeps wheels clean.
- ES Type: Spirited driving & winding roads.
- S Type: Street-sports & occasional track.
- Z Type: Street → supersprints → light circuit.
- RE / Specom B: Motorsport-only – not suitable for road use.
Most street-compound DIXCEL pads include wear sensors if the vehicle requires them. Some cars do not use sensors at all. If your vehicle normally runs a wear sensor and the pad set does not include one, a replacement sensor can be added separately as an optional extra.
Street-focused pads generally include anti-squeal shims and grease. Motorsport compounds typically do not include shims due to high temperature operation and racing caliper design.
Pad life depends heavily on vehicle weight, brake temperature, pad compound and driving style. Gentle daily commuting will see much longer life than repeated hard braking, spirited driving or track use, which can wear pads significantly faster.
Street compounds are designed to minimise noise. Motorsport pads may squeal when cold or lightly used – this is normal behaviour at race-level temperatures.
Yes — bedding-in is essential for correct friction transfer. Perform several medium-pressure stops to apply material to the rotor, followed by light driving to cool the brakes before heavy use.
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