ECS M Performance Front & Rear Big Brake Kit - Blue

ECS Tuning
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Was: US$7,264.30
Now: US$6,952.47
ECS M Performance Front & Rear Big Brake Kit - Blue
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Front & Rear

Product Overview

The best kind of upgrade is one that upgrades performance with aesthetics. By testing and in-house engineering, we were able to accomplish this task with an OEM+ twist - F30 M Performance big brakes for your E9X non-M. Careful machining and some thoughtful packaging allowed us to retrofit these beauties for a perfect fit. Offering improved brake torque, pedal feel, and braking response, this proprietary kit needs to be the go-to solution for your BMW.

Our engineers were tasked with doing something that had never been done before - retrofitting F30 M Performance brakes onto an E9X non-M. The front was easy enough to make a reality, and we offer M Performance 4-piston Brembo calipers with our own ECS 2-piece rotors with a variety of pad options. The rear, on the other hand, required some careful decision-making and engineering, as the factory calipers are nowhere near a bolt-on option. The solution? Careful machining of the rear caliper combined with precisely designed, black zinc chromate plated, 4140 chromoly steel brackets, allowing us to include a 350mm rear rotor and the same wide range of pad options. Parking brake functionality is even retained on most cars - 128i and 328i will require fabrication to retain this functionality.

The ECS M Performance Big Brake Kit includes:

  • Blue 4 Piston Brembo front calipers from the F3X M Performance brake kit 
  • Blue 2 Piston Brembo rear calipers from the F3X M Performance brake kit (custom machined, with brackets)
  • Front 370x30mm ECS 2-piece rotors
  • Rear 350x24mm ECS 2-piece rotors
  • ECS Exact-Fit Stainless Steel Brake Lines
  • Genuine BMW front & rear brake pad set (use any M Performance - fitment brake pad)
  • Class 12.9 mounting hardware, brake fluid, pad wear sensors


  • Bias - 63.3% front, 36.7% rear – optimally balanced for the e9x chassis
  • Brake torque – 4% increase results in more responsive braking system
  • Pedal feel – firmer pedal feel for improved modulation
  • Improved cooling & heat management - brake deeper, harder, with less fade

More on ECS Exact-Fit Stainless Steel Brake Lines (the same tried-and-true style you've probably been running for years):

  • Independently tested for DOT compliance to the FMVSS 571.106 standard for brake lines
  • Volumetric expansion verified at 17% of the maximum allowable for low expansion hose at 1500 psi, with a burst strength of nearly 2.5x the required minimum.
  • Tensile pull strength of nearly double the minimum requirement. Whip resistance of over double the required test limit. Passes 24hr salt spray test with flying colors 24hr salt spray test - no white or red rust.
  • Exceptional resistance to expansion under extreme line pressure results in improved pedal feel and braking response. Each line quality inspected and pressure tested to 3000psi.

More on ECS 2 piece Cross-Drilled/Slotted Rotors: 

  • Weight savings: save 2 lbs per axle versus the genuine BMW rotor.
  • Increased thermal capacity and Improved cooling:  
    • Heat convection (due to air flow) is considered the most important mode of heat dissipation in rotor design. The key to this is adequate air flow through the rotor.
    • ECS 2-Piece rotors feature side-specific directionally curved vanes which pump air through the rotor at a higher velocity, leading to consistent, rapid cooling on both sides equally.   
    • The air velocity in curved vane rotors is higher than pillar-post rotors and straight vane rotors, and as such curved vane rotors have been shown to cool more effectively.
  • Manufacturing quality: Manufactured exclusively for ECS Tuning in an ISO 9001 certified facility
  • Testing:  ECS 2-piece rotors have been subjected to thousands of miles of hard street use and to the elements (including snow and salt) for years. They have also been subjected to scientific brutal stress testing on the track and brake dyno, performing countless high-speed stops in quick succession.  We have measured stopping distances and elevated rotor temperatures of over 1000*F for long sustained periods (to the point of rotor bluing and catching brake pads on fire), as well as subjecting rotors to careful post-test inspection for signs of irregular wear, warping, stress cracking, or any other signs of failure.

ECS rotors have proven themselves to be robust, demonstrating excellent wear characteristics, no warping, no thermal stress cracking, no signs of hot spots and minimal pad glazing.​

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