Description
Brembo XB4.P4.61/62 4-Piston Rear Big Brake Kit
Brembo Racing Division — Motorsport Grade
Upgrade your rear braking system with the Brembo XB4.P4.61/62. This 4-piston forged monobloc caliper delivers exceptional stopping power with even pad pressure distribution across all pistons, paired with RH rotors and Endless MX72 / Winmax W615 for a complete bolt-on big brake kit solution.
Complete Kit Includes
| Calipers | Brembo XB4.P4.61/62 — 4-Piston, Forged monobloc (pair) |
| Brake Discs | RH 2-piece floating rotors (355x32mm / 370x32mm / 380x32mm) |
| Brake Pads | Endless MX72 / Winmax W615 |
| Brake Lines | Goodridge stainless steel braided brake lines |
| Mounting Hardware | AME CNC-machined 7075-T6 aluminium bells & vehicle-specific brackets |
Caliper Specifications
| Caliper Model | Brembo XB4.P4.61/62 |
| Position | Rear |
| Pistons | 4-Piston (Differential bore: 30/38mm) |
| Total Piston Area | 36.3 cm² |
| Weight (per caliper, no pads) | 2.6 kg |
| Construction | Forged monobloc |
| Material | Aluminum |
| Finish | Hard Anodized |
| Mounting | Radial |
| Compatible Disc Range | 355mm-390mm |
| Pad Shape Code | B24-B28-B29 |
Engineering & Technology
The XB4.P4 forged monobloc 4-piston caliper at 2.6 kg offers the ideal balance between braking performance and weight savings for rear axle applications. Its 30/38mm differential bore pistons ensure even pad wear distribution.
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
Available pad options:
- Endless MX72
- Winmax W615
Brembo pad shape code: B24-B28-B29 — use this code when ordering replacement pads.
RH Disc & Pad Options
Brake Discs:
- RH — 2-piece floating rotor with CNC-machined 7075-T6 aluminium bell
Brake Pads:
- Endless MX72
- Winmax W615
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
- RH Brake Pads for Brembo XB4P46162
- RH Brake Rotors
- All Brake Pads
- All Brake Rotors
- Brembo Big Brake Kit Collection
Lead Time: Approximately 5–14 business days.
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