Description
AP Racing CP9440 4-Piston Front Big Brake Kit
AP Racing Pro 5000 R — Radi-CAL™ Forged 2-piece
Upgrade your front braking system with the AP Racing CP9440. This 4-piston forged 2-piece caliper delivers exceptional stopping power with even pad pressure distribution across all pistons, paired with EIAUFA rotors and EIAUFA RT550 performance compound for a complete bolt-on big brake kit solution.
Complete Kit Includes
| Calipers | AP Racing CP9440 — 4-Piston, Forged 2-piece (pair) |
| Brake Discs | EIAUFA 2-piece floating rotors (286x24mm / 295x28mm / 330x28mm) |
| Brake Pads | EIAUFA RT550 performance compound |
| Brake Lines | Goodridge stainless steel braided brake lines |
| Mounting Hardware | AME CNC-machined 7075-T6 aluminium bells & vehicle-specific brackets |
Caliper Specifications
| Caliper Model | AP Racing CP9440 |
| Position | Front |
| Pistons | 4-Piston |
| Total Piston Area | 47.12 cm² |
| Weight (per caliper, no pads) | 2.16 kg |
| Construction | Forged 2-piece |
| Material | Aluminum |
| Finish | – |
| Mounting | Radial |
| Mounting Centers | 152mm |
| Compatible Disc Range | 315-330mm |
Engineering & Technology
The CP9440 Pro 5000 R delivers 47.12 cm² piston area from 36.0/41.3mm differential bore pistons at just 2.16 kg. With 152mm Radi-CAL mounting centres and stainless steel pistons, it’s the ideal general motorsport 4-piston caliper for front and rear applications.
Performance Upgrade
- Fixed Caliper Design: Eliminates flex and provides consistent pad-to-disc contact across all pistons, unlike factory sliding calipers
- Differential Bore Pistons: Progressively sized pistons distribute clamping force evenly, eliminating tapered pad wear
- Increased Disc Diameter: Larger swept area dramatically improves heat dissipation and braking torque
- Reduced Unsprung Weight: Lightweight aluminum construction improves suspension response and handling
Compatible Pad Compounds
| Use Case | Recommended Compounds |
|---|---|
| Daily Driving | EIAUFA RT550 |
| Spirited Street + Track Days | EIAUFA RT550 |
| Dedicated Track | EIAUFA RS830 |
EIAUFA Disc & Pad Options
Brake Discs:
- EIAUFA GG — 2-piece floating rotor with CNC-machined 7075-T6 aluminium bell (standard)
- EIAUFA HC — High-carbon rotor for improved thermal stability and crack resistance (upgrade)
Brake Pads:
- EIAUFA RT550 — Street/Daily compound
- EIAUFA RT550 — Street/Track compound
- EIAUFA RS830 — Track/Race compound
Custom Brake Solutions
At AME MOTORSPORT, we design and manufacture adapters for virtually every vehicle make and model. All our brake kits are engineered for direct bolt-on fitment across a wide range of vehicles.
- AME CNC-machined 7075-T6 aluminium disc bells & vehicle-specific mounting brackets
- Steel brackets available on request for heavy-duty applications
- Goodridge stainless steel braided brake lines
- All necessary mounting hardware included
Brake discs can be customised with square-slot pattern and full-floating conversion. Please contact us for consultation.
Need a different disc size, pad compound, or custom bracket solution? Contact us to discuss your specific requirements.
Warranty
| Brake Calipers | 1-year warranty against manufacturing defects |
| Brake Discs & Pads | Wear components — not covered under warranty |
| Defect Coverage | Includes cracking, material separation, or other failures without external force. Normal wear and damage from misuse are excluded. |
Related Products & Guides
- EIAUFA Brake Pads for AP Racing CP9440
- EIAUFA Brake Rotors
- All Brake Pads
- All Brake Rotors
- AP Racing Big Brake Kit Collection
Lead Time: Approximately 5–14 business days.
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