BMW M2 / M3 / M4 F80 F82 F83 F87 – BTCC Big Brake Kit - AP Racing CP9668 Endurance Caliper 25mm Pad | XC3 Engineering

Product Overview

Upgrade the braking performance of your BMW M2, M3 or M4 F8X with the XC3 BTCC Big Brake Kit featuring AP Racing CP9668 Pro 5000 R six-piston endurance calipers. Built around ex-BTCC 368mm x 36mm floating rotors, 25mm brake pads and XC3 precision-engineered mounting components, this complete front brake upgrade is designed for fast road, track day and endurance use.

The CP9668 caliper uses a deeper 25mm pad compared with the 18mm pad used in the CP9660, giving increased pad volume, longer consumable life and improved suitability for repeated high-temperature braking.

Key Features

• AP Racing CP9668 Pro 5000 R six-piston endurance calipers
• Choice of Anodised Grey or Nickel Plated caliper finish
• Full-depth 25mm brake pad format
• Ex-BTCC 368mm x 36mm floating brake rotors
• XC3 6082-T6 billet aluminium rotor bells
• XC3 6082-T6 billet aluminium caliper brackets
• AP Racing floating bobbin hardware
• Optional anti-rattle clips available
• Braided front brake lines
• Chemi black high-tensile bracket hardware
• Choice of 25mm Endurance Brake Pads
• Designed for BMW M2, M3 and M4 F8X with OEM front hubs
• XC3 manufactured components covered by our Lifetime Warranty

Product Description

The BMW M2, M3 and M4 F8X platform is highly capable, but repeated hard braking on road or track can quickly expose the limits of the factory braking system. Higher speeds, high-grip tyres, increased power and longer sessions create more heat, more pad demand and less braking consistency.

The XC3 BTCC Big Brake Kit solves this with a motorsport-derived braking package built around 368mm x 36mm floating BTCC rotors and AP Racing CP9668 endurance calipers. The larger rotor size increases thermal capacity, while the floating bobbin assembly allows controlled rotor expansion under temperature. The CP9668’s 25mm pad format gives more friction material volume than the CP9660, making it better suited to longer sessions, heavier use and endurance-focused driving.

Customers can choose between Anodised Grey calipers for a motorsport-style finish or Nickel Plated calipers for a premium, corrosion-resistant appearance. Optional anti-rattle clips are also available for customers who want to reduce floating rotor hardware noise while retaining the benefits of a floating disc assembly.

XC3-designed bells and caliper brackets ensure correct rotor positioning, caliper alignment and pad sweep on the F8X chassis. The supplied rotors are inspected ex-BTCC components, allowing customers to access high-level motorsport hardware at a more cost-effective price point than a fully new equivalent setup. Some cosmetic marks and signs of previous motorsport use should be expected.

Why Buy from XC3

XC3 Engineering designs and manufactures key brake kit components in the UK, including our vehicle-specific rotor bells and caliper brackets. Every XC3-manufactured component is developed for accurate fitment, correct brake geometry and real-world track use.

Our manufactured components are covered by the XC3 Lifetime Warranty, giving you confidence that your brake kit is supported by proper engineering, not just supplied as a collection of parts.

All XC3 Big Brake Kit customers also receive 10% off future replacement brake consumables, including pads, rotors, bells and service hardware, helping reduce long-term running costs.

What’s Included

• 2 x AP Racing CP9668 six-piston endurance calipers
• Choice of Anodised Grey or Nickel Plated caliper finish
• 2 x ex-BTCC 368mm x 36mm floating brake rotors
• 2 x XC3 6082-T6 billet aluminium rotor bells
• 2 x XC3 6082-T6 billet aluminium caliper brackets
• 2 x AP Racing floating bobbin kits
• Optional anti-rattle clips
• 1 x pair braided front brake lines
• Chemi black high-tensile mounting hardware
• 1 x set of Endurance Brake Pads 

Brake Pad Comparison Table — CP9668 Endurance Caliper

Quick Customer Guide

Big Brake Kit Customer Benefit

Customers who purchase an XC3 Big Brake Kit receive 10% off future replacement consumables, including replacement brake pads, discs, bells and hardware. This helps reduce ongoing running costs and makes maintaining your brake kit more affordable over time.

Vehicle Fitment

• BMW M2 F87
• BMW M2 Competition F87
• BMW M3 F80 inc Comp
• BMW M4 F82 inc Comp
• BMW M4 F83 inc Comp

For vehicles using OEM front hubs. Professional installation required. Wheel clearance must be checked before ordering, especially with aftermarket wheels. These kits may be made to order depending on stock availability.

We understand it can be a bit confusing to figure out if a part will work for your car. No worries! Just shoot us a message with your question, and our friendly sales team will then be in touch to confirm if this part is the correct for your vehicle!

Disclaimer:

Products sold by Nineteen72 Performance are exclusively designed for off-road or sanctioned competition use. Any use on public roads is strictly prohibited and may violate local, state, and federal laws. Nineteen72 Performance does not confirm the legality of road use; it is the consumer's responsibility to comply with applicable laws. Use of these products for any purpose other than intended is at the user's own risk. Nineteen72 Performance is not liable for misuse or non-compliance.

Warranty:

At Nineteen72 Performance, we proudly back every product in our store, ensuring that each item comes with a comprehensive warranty.

All components crafted by our esteemed third-party partners in the store are accompanied by a minimum one-year manufacturer's warranty. Our warranty terms are uniform across all products, providing coverage for any manufacturing defects that may arise over time, excluding typical wear and tear. Your satisfaction and product durability are our top priorities.

Shipping & Returns:

At Nineteen72 Performance we offer worldwide shipping.

14-Day Easy Returns at Nineteen72 Performance

Love what you bought from Nineteen72 Performance? Great! If not, no worries. Enjoy a hassle-free 14-day return window. Just ensure your items are unused and in their original condition. For returns, contact us at Returns@Nineteen72Performance.co.uk. Your satisfaction drives us.

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Offers a number of options at checkout including: Pay Later (delay payment by up to 30 days, interest free); Split Payments (split payments in 3 up to 3 months, interest free); Installments (split payments up to 6 months interest-free, up to 24 months interest bearing). Maximum purchase £1,500.

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