Ultralight aluminum subframe bushings with roll center correction for BMW E46

Core Race Tech – Motorsport Parts & Engineering

A set of CNC-machined lightweight aluminum bushings for the rear axle of the BMW E46. The CRT bushings were developed for use in modified vehicles as well as for clubsport and motorsport applications.

The bearing design is based on the solution that was very successfully used by BMW Motorsport in the WTCC .

The focus is on weight savings compared to the standard bushings and the targeted adjustment of the roll center height on the rear axle. Especially on lowered vehicles, the suspension geometry and thus the position of the roll center can change. The corresponding roll center correction allows for a targeted adjustment of the rear axle geometry to the respective vehicle and suspension setup.

The rigid aluminum construction massively reduces the elastic deformation of the bearing compared to standard rubber bearings. This allows the rear axle to be guided more precisely, creating a more direct driving feel and more consistently reproducible vehicle response.

Features

• Lightweight construction: Weight reduction compared to the standard bearing:
  • 0.95 kg lighter than the OEM bushings
  • additional 1 kg savings by eliminating the aluminum strut bar (non-M E46)
  • additional 4.5 kg savings by eliminating the steel strut bar with V-brace (M3)
    
• Eliminating the factory rubber bushings also removes the need for the support provided by the original thrust brace, making the brace redundant. With CRT aluminium bushings, the rear subframe no longer undergoes elastokinematic tilting during load changes. This significantly reduces stress on the rear subframe mounting points in the body compared with the factory rubber bushings or polyurethane alternatives.
• Roll center correction: Maximum adjustment of the roll center height on the rear axle
• Rigid bearing: no elastic movements of the rear axle bearing, thereby relieving the axle mounts in the bodywork (known E46 problem).
• Improved handling: More traction, better feedback and better driving precision
• CNC-machined aluminum components made of high-strength aluminum: Precisely manufactured parts for motorsport
• Black anodized surface: For a high-quality look and additional surface protection

Scope of delivery

• 2 × front bushings
• 2 × rear bushings
• High-strength mounting bolts
• Installation instructions

Technical Data & Information

• Product: Lightweight aluminum bushings with roll center correction
• Vehicle application: BMW E46 (M3 and AG models), BMW E85/E86
• Material: Aluminum
• Surface: Black anodized
• Construction: Rigid aluminum bearing
• Application area: Clubsport and motorsport

Notes

• Please check the compatibility with your vehicle and the intended suspension setup before purchase.
• Due to the rigid bearing, noises and vibrations can be transmitted more strongly into the bodywork than with standard rubber bearings.
• The actual weight savings depend on the standard bearing used and the respective vehicle configuration.
• The effect of the roll center correction depends on vehicle height, suspension geometry and installation situation.
• Motorsport item. Before use in public road traffic, the applicable approval and operating regulations must be observed.

About Core Race Tech

Core Race Tech develops and distributes technical components for vehicle modifications and motorsport. Our focus is on functional solutions, well-thought-out designs and practical products. Our products have already been successfully tested in motorsport for years.

Core Race Tech – Built for the Track.