Ultimate Kit | BMW E9X & E82

Product Code: BK-ULT-M3

Available Options

Look no further than the Harrop "Ultimate" kit to satisfy the demands of serious street and track enthusiasts.

The 2-piece bobbin drive system utilised in the front rotors is the same system that is used in motorsport applications to handle the heat differential between the cast iron rotors and aluminium adaptors (hats).

The rotor and caliper design pushes the boundaries of extreme braking to achieve world class performance with independently tested 100-0 km/h stopping distances less than 35m. The kit provides the ultimate in performance while maintaining perfect braking balance under all driving conditions.

Front Rotors: 381mm x 32mm 2-Piece, 48 vane, bobbin drive with 24 broken slots.
Rear Rotors: 356mm x 28mm 2-Piece, 36 vane directional with 24 broken slots.
Front Calipers: 6 Piston lightweight aluminium calipers available in selected colours.
Rear Calipers: 4 Piston lightweight aluminium calipers available in selected colours.

Vehicle Applications:  

  • BMW E90, 92 & 93 M3
  • BMW E82 1M


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Why do I need to Upgrade?
  • If you have fitted a wheel/tyre package that has an effective diameter greater than standard, the brake effectiveness is reduced, the force required on the rotor to slow the car increases by approximately 8% per 50 mm increase in effective tyre diameter. This means the driver needs to push harder on the pedal to stop, and results in increased rotor and pad wear.
  • ABS, ESC/DSC or EBD can't help you under brake fade conditions, the OEM brake systems are designed exclusively for road use and tested to comply with ADR 31/01*
  • If you use your car for any track work, you'll be driving at much higher speeds with much less recovery time and braking many more times than the ADR test. The OEM brake system isn't designed to cope with track work
  • If your vehicle has increased power and torque due to other modifications such as a Harrop supercharger, camshaft, intake and or exhaust upgrades; The faster you can accelerate, the less time you will have to decelerate.


  • A minimum of an 19” wheel diameter is required, excluding specific BMW 18" forged motorsport wheels - Caliper sweep template is available above in the download tab to check specific fitments.
  • Stainless steel braided brake lines are included as part of the kit.
  • Calipers available in red, yellow, black, silver, orange or green.
  • Installation of performance braking components may cause the brakes during application to emit noise or ‘brake squeal’ at times, subject to both environmental and vehicle conditions. This noise is associated with the increased performance and friction of the upgraded brake system and in most cases is considered normal. 
  • Images are for illustration purposes only
  • Please note that the installation of aftermarket braking components may cause additional brake noises from your vehicle, which can be a characteristic trade-off when fitting a performance brake system or components. Whilst this noise typically originates from the braking components, many external factors like driving application, conditions, and vehicle components such as suspension and chassis can amplify these brake noises. Whilst every effort is made to mitigate and reduce brake noise to the lowest level possible, any additional noise is classed as acceptable and does not substantiate a product fault.

*ADR 31/01 Prescribes a fade and recovery test, hot performance where the car is braked from a maximum of 120 to 60 km/h 15 times with 45 seconds between each brake application. The vehicle must then pass an ordinary performance test and achieve 75% of the initial cold test result.




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