BMW Suspension Bushings & Mounts

BMW E46 Z4 Rear Polyurethane Differential Bushing Performance is the ultimate upgrade for enhancing the connection between your BMW's chassis and differential. Designed by Turner Motorsport, this performance bushing replaces the soft factory rubber with durable polyurethane, offering superior control and response. By minimizing vibrations and reducing deflection, this bushing ensures a more direct and responsive driving experience, making it a must-have for any performance-oriented BMW E46 or Z4 owner.

• Enhanced Performance: Replaces the soft factory rubber with durable polyurethane for improved driveline response.
• Reduced Vibrations: Minimizes vibrations between the chassis and differential, providing a more connected driving experience.
• Increased Durability: Made from high-quality polyurethane, offering long-lasting performance under demanding conditions.
• Improved Control: Reduces deflection, ensuring a more precise and responsive handling experience.

Due to their soft rubber construction, OE strut mounts are known to wear at an accelerated rate. Many high-mileage vehicles fall victim to strut mount failure, which is commonly associated with annoying clunks, groans, or rattles from the front suspension.

With this issue in mind, ECS Tuning developed their heavy-duty front strut mount with upgraded, higher durometer rubber to resolve sloppy handling and increase longevity. Manufactured precisely within OEM tolerances, these mounts are a perfect fit for your BMW.

Features:

Reduces deflection: Increases vehicle handling and cornering dynamics by removing deflection within the strut mount. Increases longevity: Upgraded rubber construction makes for a stiffer mount, less prone to cracking and general degradation. Developed in-house: Designed and tested by ECS Tuning engineers, this mount is sure to outlast an OE replacement. Upgrade to a better strut mount without sacrificing ride comfort! Improve longevity and ride control all at once.

Designed to work with the original bushing and eliminate over compliance or better known in motorsport as 'lost motion' of the rear crossmember. This Whiteline kit dramatically reduces rear cross member misalignment and movement which allows a more positive feel from the rear end during cornering.

Features:

• Performance - Whiteline's engineered "Synthetic Elastomer" bushings feature the quality ride of rubber at lower speeds and at higher speeds react when under cornering, accelerating and braking loads, for CHASSIS CONTROL and improved handling.
• Durable - The advanced synthetic elastomer characteristics ensure superior elasticity, memory and outright durability for all forms of driving applications!
• Resistant - Whiteline's synthetic elastomer formulation boasts resistance to oil, grease, ozone and weathering
• Lubricant - Supplied with extreme pressure molybdenum disulphide (LM) based grease (where required) for extended life.
• Installer Friendly - Designed with the installer in mind by reducing the need of specialized skills, tools and equipment.
• Black - The neutral (black) appearance favored by restorers and racers.
• Lifetime Warranty - All Whiteline bushing kits are backed by a lifetime warranty

These bushings replace the stock rubber bushings and offer a better driving feel, increased lifespan, and better wheel alignment.

Rubber bushing allow for a lot more movement and are more susceptible to wear and tear from spirited driving and harsh weather conditions. Polyurethane is much more resistant to wear and is stiffer, reducing the total amount of movement that would normally affect the alignment negatively.

When high torque loads and aggressive corner exits push your chassis to the limit, stock differential mounts quickly become the weak link. The ECS Tuning Rear Differential Front Mount Upgrade Kit is track-engineered to lock down your rear diff, control axle wrap, and ensure immediate power delivery to the pavement.

Built to withstand severe track abuse, this kit eliminates hardware failure by replacing the undersized factory M12 bolt with an ultra-high-tensile Grade 12.9 M14x1.5 bolt. Surrounding the upgraded hardware is a track-spec 95A durometer red polyurethane bushing and a rugged 6061-T6 aluminum sleeve finished in Type II black anodizing. Engineered for maximum drivetrain stiffness, this upgrade ensures your differential stays precisely aligned under the harshest motorsport conditions.

Note: Upgrading to M14x1.5 hardware requires drilling and tapping the original M12x1.5 differential mounting hole. See T#58563042 for a complete kit that includes the proper-sized drill and tap.