BMW M2 / M3 / M4 F8X BTCC Brake Conversion Kit – Caliper Carriers & Rotor Bells for AP Racing CP9660 | XC3 Engineering

Product Overview

The XC3 Engineering BTCC Brake Conversion Kit is a precision-engineered solution for upgrading the braking system on BMW M2, M3 and M4 F8X chassis using AP Racing CP9660 calipers (not included).

This kit includes CNC-machined caliper carriers and lightweight performance rotor bells, engineered to position CP9660 calipers correctly and allow use of BTCC-spec 368 × 36 mm rotors. Every component is manufactured to motorsport tolerances, ensuring repeatable braking performance, structural rigidity, and reliable thermal behaviour under extreme use.

Ideal for track builds, time-attack cars, and high-performance road applications seeking a proven, high-capacity braking foundation without compromise.

Kit Details and Contents:

• XC3 Custom caliper brackets
• XC3 Custom Rotor Bells 
• 6082 T6 aluminium construction
• Black anodised for longevity
• CNC engraved 
• Caliper bracket hardware included
• Designed and manufactured in the UK

Maximize cost efficiency and performance with the utilisation of BTCC rotors and the industry-leading AP Racing 5000R CP9660 caliper. This upgrade is a must-have for any Clubsport or Trackday build, providing unparalleled performance and value.

Fitment:

BMW M2 M3 M4 F8X with standard OEM Front Hubs

Lifetime Warranty

This product is backed by the XC3 Lifetime Warranty, giving you complete confidence in its strength and durability. All XC3 components are designed and manufactured to the highest standards, ensuring long-term reliability and performance. Because we believe in the quality of our engineering, we offer a lifetime warranty on every part we produce.

Related Parts:

Replacement ex-BTCC Rotors → View Product

AP Racing Bobbins → View Product

Full bolt on BTCC Kit for BMW M3 F8X → View Product