AP Racing CP9665 Front Big Brake Kit – BMW M2/M3/M4 (F87/F80/F82/F83)

Overview
Engineered for serious motorsport and high-performance street applications, this AP Racing CP9665 Front Big Brake Kit pairs AP’s legendary 6-piston forged calipers with Paragon’s 378x36mm floating rotor rings. Designed for the BMW M2 (F87), M3 (F80), and M4 (F82/F83), this kit delivers maximum braking torque, thermal stability, and consistency under extreme conditions.

Caliper Specifications – AP Racing CP9665
- Forged 2-piece aluminium alloy body
- Radial mount – 210.0mm x 42.0mm centres
- Weight: 3.1 kg (without pads)
- Asymmetric design for increased stiffness and dynamic performance
- Anti-knockback springs (7lb) fitted
- Stainless steel pistons and wear plates
- High temperature racing seals
- Hydraulic Thread: M10x1.0

Piston Sizes
- Ø27.0mm x 2
- Ø31.8mm x 2
- Ø38.1mm x 2
Total piston area: 50.1 cm²

Brake Pad Information
- Pad shape: AP Racing CP6230D54
- Pad area: 81.62 cm²
- Pad depth: 54.0mm
- Pad thickness: 25.0mm
Note: Top tag must be removed before installation

Rotor Specifications – Paragon Performance Rotor Rings
- Size: 378mm x 36mm (14.88” x 1.42”)
- P.C.D.: 240mm, 12x9.5mm Mounting
- Directional 72-vane design for enhanced airflow and cooling
- Constructed from CM-250 high-carbon alloy cast iron
- CBN surface machining for perfect pad bedding and minimal vibration
- Heat treated for stress relief and crack resistance
- Floating 2-piece design with self-centering behaviour
- Slotted face for optimal pad bite, heat dissipation, and wet performance
- Weight: 9.57 kg (21.10 lbs) each

Performance Benefits
- Up to 30% cooler than OEM rotors
- Increased resistance to fade, cracking, and distortion
- Minimized unsprung weight for improved handling
- Reduced judder during extended track sessions

Kit Includes
- 1x AP Racing CP9665 Right Caliper – CP9665-2S7L
- 1x AP Racing CP9665 Left Caliper – CP9665-3S7L
- 1x Pair Paragon 378x36mm Rotor Rings (LH & RH)
- Pad Retainers, Anti-knockback springs, and Mounting Hardware
- Detailed installation instructions

Replacement Rotor Compatibility
- AP Racing CP3718-2068 / CP3718-2069
- AP Racing CP5772-2068 / CP5772-2069

Vehicle Compatibility
- BMW M2 (F87)
- BMW M3 (F80)
- BMW M4 (F82 / F83)