Product Overview
Unlock serious braking performance for your BMW M2, M3 or M4 F8X with the XC3 BTCC Big Brake Kit.
Built around AP Racing CP9660 Pro 5000 R six-piston calipers, professionally skimmed ex-BTCC 368mm x 36mm floating brake rotors and XC3 precision-engineered mounting components, this complete front brake upgrade delivers proven motorsport hardware in a package designed specifically for the BMW F8X platform.
Each ex-BTCC rotor is professionally skimmed before supply, removing the previous pad transfer layer and providing a fresh braking surface ready to be bedded in with your chosen new brake pad compound.
Choose from Pagid RSL29, PFC 11, Ferodo DSUNO or Ferodo DS3000 depending on your intended use and preferred braking characteristics.
What’s Included
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2 x AP Racing CP9660 Pro 5000 R six-piston calipers
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Choice of Anodised Grey or Nickel Plated caliper finish
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2 x professionally skimmed ex-BTCC 368mm x 36mm floating brake rotors
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Your choice of new brake pad compound
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2 x XC3 anodised aluminium rotor bells
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2 x XC3 anodised caliper brackets
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2 x AP Racing floating bobbin kits
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1 x pair braided front brake lines
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High-tensile mounting hardware
Professionally Skimmed Ex-BTCC Rotors
The 368mm x 36mm floating rotors used in this kit are genuine ex-BTCC motorsport components which are inspected and professionally skimmed before supply.
During braking, pad material forms a transfer layer on the rotor surface. Different brake pad compounds use different friction materials, and introducing a new compound onto an existing transfer layer can contribute to uneven deposits, vibration or inconsistent bedding.
Professional skimming removes the previous braking surface and pad transfer layer, providing a clean, refreshed face ready for the new pad compound selected with the kit.
This provides:
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A fresh rotor surface for bedding in new brake pads
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Removal of previous pad deposits and transfer material
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Greater flexibility when choosing brake pad compounds
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More consistent initial bedding
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Reduced risk of incompatible pad transfer layers
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A cleaner starting point for the complete braking system
The rotors remain ex-BTCC components, so cosmetic marks and evidence of previous motorsport use should still be expected. Skimming refreshes the braking faces rather than making the rotor a new component.
Choose Your Brake Pad Compound
The kit can be supplied with a choice of new motorsport brake pads, allowing the braking characteristics to be matched to the way the car is used.
Pagid RSL29
Endurance-focused compound with excellent modulation, consistency and pad life. A strong choice for longer track sessions and drivers prioritising predictable braking behaviour.
PFC 11
High bite with excellent modulation and release characteristics. Ideal for drivers wanting a sharper, more responsive pedal feel for hard track and sprint use.
Ferodo DSUNO
High-performance race compound with strong braking torque, excellent control and good high-temperature performance. Well suited to heavy track use and demanding applications.
Ferodo DS3000
Aggressive race compound with very strong initial bite. Best suited to sprint, competition and track applications where maximum response is preferred.
Other brake pad compounds are also available upon request. If you require a specific manufacturer or compound, contact XC3 and we can advise on compatibility and availability for the AP Racing CP9660 caliper.
Product Description
The BMW M2, M3 and M4 F8X platform is extremely capable, but repeated heavy braking can expose the limitations of the factory front brake system. Increased power, higher speeds, high-grip tyres and sustained track use all generate significantly greater braking temperatures.
The XC3 BTCC Big Brake Kit combines the AP Racing CP9660 six-piston caliper with a 368mm x 36mm floating rotor to increase thermal capacity and provide more consistent braking performance during repeated high-temperature use.
The floating rotor assembly allows controlled radial expansion as rotor temperature increases, helping reduce stress between the rotor and aluminium bell while maintaining consistent rotor alignment.
XC3-designed rotor bells and caliper brackets correctly position the AP Racing hardware on the BMW F8X platform, maintaining accurate caliper alignment, rotor positioning and pad sweep.
Replacement AP Racing bobbins and anti-rattle clips are available separately from XC3. Anti-rattle clips can be used to reduce the characteristic noise associated with floating brake hardware, while replacement bobbins allow the floating rotor assembly to be serviced when required.
Key Features
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AP Racing CP9660 Pro 5000 R six-piston calipers
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Choice of Anodised Grey or Nickel Plated finish
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Professionally skimmed ex-BTCC 368mm x 36mm floating brake rotors
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Fresh braking surface ready for new pad bedding
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Choice of four new motorsport brake pad compounds
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Additional brake pad compounds available upon request
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XC3 anodised aluminium rotor bells
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XC3 anodised caliper mounting brackets
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Genuine AP Racing floating bobbin hardware
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Replacement bobbins and anti-rattle clips available separately
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Braided front brake lines
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High-tensile mounting hardware
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Designed specifically for BMW F8X M2, M3 and M4
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XC3 manufactured components covered by our Lifetime Warranty
Why Buy from XC3
XC3 Engineering designs and manufactures the vehicle-specific components required to correctly integrate AP Racing motorsport hardware with the BMW F8X platform.
Our rotor bells and caliper brackets are engineered for accurate fitment, correct brake geometry and demanding road and track use.
By supplying the ex-BTCC rotors professionally skimmed and pairing them with a new brake pad compound of your choice, the kit provides a clean starting point for correct pad bedding and allows the braking setup to be matched to the intended use of the car.
Every XC3-manufactured component is covered by our Lifetime Warranty.
XC3 Big Brake Kit customers also receive access to discounted replacement brake consumables, including pads, rotors, bells and service hardware, helping reduce the long-term running costs of the braking system.
Vehicle Fitment
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BMW M2 F87
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BMW M2 Competition F87
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BMW M3 F80
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BMW M3 Competition F80
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BMW M4 F82
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BMW M4 Competition F82
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BMW M4 F83
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BMW M4 Competition F83
For vehicles using OEM front hubs. Professional installation is required.
