BMW M-Performance BBK – 370/380 Front & 345 Rear Calipers – E9X F2X F3X F8X M3 M4

Upgrade your BMW’s braking performance with the BMW M Performance Big Brake Kit (BBK), featuring large-diameter front rotors in 370mm or 380mm configurations and 345mm rear brakes, depending on the application. Designed for performance-oriented BMW builds, this brake package offers increased braking capacity, improved heat management potential, and a more aggressive M-inspired appearance.

Whether you’re driving on the street, pushing your car through mountain roads, or building a track-focused setup, upgrading to a larger brake package can provide improved braking consistency and better resistance to brake fade when paired with suitable pads, fluid, and tires.

Designed for select BMW E9X, F2X, F3X, and F8X platforms, this BBK is an excellent upgrade for enthusiasts seeking stronger, more consistent braking performance.

Key Features

Large-Diameter Front Brakes – 370mm / 380mm
Choose the appropriate front brake configuration for your vehicle. Larger rotors provide greater leverage at the wheel and can improve heat capacity when matched with compatible calipers, pads, and rotor designs.

345mm Rear Brake Configuration
The 345mm rear setup complements the front brakes to provide a balanced braking package when correctly matched to the vehicle’s brake system and factory specifications.

Improved Heat Management Potential
Larger rotors can provide additional thermal mass and surface area, helping manage heat during repeated hard braking. Actual fade resistance depends on rotor construction, pad compound, brake fluid, cooling, and driving conditions.

Performance-Focused Braking
When equipped with suitable performance pads and high-temperature brake fluid, the kit can support more consistent braking during spirited driving and occasional track use.

M Performance Styling
The larger brake package gives the vehicle a more aggressive, motorsport-inspired appearance behind compatible wheels.

Street and Performance Applications
Suitable for performance street builds and select track-day applications when configured with the correct brake components and consumables.

Vehicle-Specific Fitment
Caliper, rotor, bracket, wheel-clearance, and brake-line compatibility must be confirmed for the specific BMW chassis and factory brake configuration.

Compatible BMW Applications

The following chassis are potential applications only. Exact compatibility depends on the specific kit, caliper part numbers, rotor dimensions, and vehicle equipment.

BMW E9X

• BMW 3 Series E90 Sedan
• BMW 3 Series E91 Touring
• BMW 3 Series E92 Coupe
• BMW 3 Series E93 Convertible
• BMW M3 E90 Sedan
• BMW M3 E92 Coupe
• BMW M3 E93 Convertible

BMW F2X

• BMW 1 Series F20 / F21
• BMW 2 Series F22 Coupe / F23 Convertible
• BMW M2 F87 — fitment must be verified separately

BMW F3X

• BMW 3 Series F30 Sedan / F31 Touring / F34 Gran Turismo
• BMW 4 Series F32 Coupe / F33 Convertible / F36 Gran Coupe
• BMW 335i / 340i and 435i / 440i — subject to factory brake configuration

BMW F8X M Models

• BMW M3 F80 Sedan
• BMW M4 F82 Coupe
• BMW M4 F83 Convertible

Important Fitment Notes

• 370mm and 380mm front configurations are not interchangeable by assumption. Confirm the exact rotor diameter and caliper combination supplied.
• The 345mm rear setup must match the correct rear calipers, brackets, rotor offset, and parking-brake arrangement.
• Wheel clearance depends on wheel diameter, barrel shape, spoke design, and offset; some 18-inch wheels may not clear the brakes.
• Brake-system coding, sensor compatibility, brake hoses, and electronic parking-brake requirements may vary by chassis.
• Some M models already use larger factory brakes, so an upgrade may require a specific conversion package rather than a direct bolt-on installation.
• Professional installation and brake-system inspection are strongly recommended.

What’s Included

Kit contents depend on the exact configuration supplied. Confirm whether the package includes:

• Front brake calipers
• Front rotors (370mm or 380mm)
• Rear brake calipers
• Rear rotors (345mm)
• Caliper brackets and mounting hardware
• Brake pads
• Brake lines and wear sensors, where applicable

Do not assume every item is included unless specified in the product listing.

Why Upgrade Your BMW Brakes?

The braking system is just as important as engine performance, particularly on modified BMWs with increased power and weight demands during repeated high-speed braking. A correctly matched big brake kit can improve thermal capacity and braking consistency when combined with the right pads, fluid, tires, and setup.

The BMW M Performance BBK is designed for enthusiasts looking to enhance braking capability, improve the appearance of their vehicle, and build a more confidence-inspiring performance package.

Product: BMW M Performance Big Brake Kit
Front Rotor Options: 370mm / 380mm
Rear Rotor: 345mm
Platform Applications: Selected BMW E9X / F2X / F3X / F8X models

Fitment disclaimer: Confirm the exact caliper part numbers, rotor dimensions, and vehicle compatibility before ordering. The chassis list above is not confirmation that every listed model accepts the same kit.

Add estimated braking performance gainsClarify exact kit configuration options