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.

Enhance rear-end control and put more power to the ground with a straightforward 3-piece design that installs with ease. The factory rubber may favor ride comfort, but it struggles to keep up when driving gets aggressive. As it wears, the OEM bushing can soften and deform, reducing stability and allowing wheel hop to creep in when you need traction most.

Our 95A durometer polyurethane bushings solve that problem. Engineered to strike the perfect balance between soft factory rubber and harsh solid mounts, they significantly reduce differential movement without introducing excessive vibration. The result is more efficient power transfer, so your torque goes straight to the rear wheels instead of being lost in drivetrain flex.

Features & Benefits:

Minimizes differential movement and instability to help eliminate wheel hop
Two-piece 95A split polyurethane design for easier installation
Precision-fit insert reinforces the bushing and strengthens mounting points
Resistant to road salt, oils, and harsh chemicals
Compatible with dual mount differential plates
Design:

Type II Anodized 6061-T6 CNC billet aluminum inserts for superior corrosion resistance and durability.
95A Polyurethane 2-Piece Isolator.
Product Development:

Our Rear Differential Bushings are designed, engineered, tested, and quality inspected by our Research & Development team. Our development process includes leading-edge product technology: FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer, and rigorous long-term product testing.

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 have the hole off-center to give your car a little more track, caster, and camber. This style came as standard equipment on E30 M3s (8/89-later) and 1995 E36 M3 but will work with any E30, E36, Z3.

Rubber control arm bushings are designed to flex and absorb energy. That's fine on a streetcar but on an all-out racing machine you want your alignment to stay constant. We have picked Delrin for this application due to its high rigidity and low coefficient of friction allowing for minimal suspension bushing deflection (geometry change) but decreasing bushing windup or drag (friction). They are not recommended for street-use but highly-recommended for track cars.

To save time, pick up a pair of new bushing carrier brackets and hardware. This will save you the time and hassle of pressing out the old bushings. This will especially save you time if you're buying new control arms at the same time (no time wasted removing the old brackets from the arms). Stainless steel set screws included.

The ECS Tuning Billet Front Sway Bar Mounting Kit will provide your vehicle with a more rigid mounting solution from the sway bar to chassis than the OEM steel brackets. With an improved sway bar mounting bracket and the included polyurethane sway bar bushings you can expect to achieve an increase in rear sway bar effectiveness and less body roll as a result.

PART DESIGN

The front sway bar mounting brackets are made from a solid piece of 6061-T6 billet aluminum that are precision CNC-machined to bolt into the OEM mounting location while utilizing greaseable, polyurethane bushings. They are Type II black anodized for corrosion protection and include zinc flake coated Class 12.9 alloy steel bolts for premium performance.

The red polyurethane bushings feature a greaseable channel for extended service life and quieter operation than standard polyurethane bushings.

PERFORMANCE FEATURES

Billet & poly mounts replacing the OEM steel & rubber configuration you can expect faster reaction speed and greater effectiveness from your front sway bar due to less deflection. This translates to better handling with sharper, flatter cornering with reduced body roll.

PRODUCT DEVELOPMENT

ECS Billet Front Sway Bar Mounting Kit was designed, engineered, tested and quality inspected by the Research and Development team in our Wadsworth, Ohio facility to ensure the highest level of precision and quality is delivered throughout rigorous long term product testing and leading edge product development methods.

INSTALLATION AND SUPPORT

Installation is simple. Simply unbolt your front sway bar mounting brackets and slip over our poly bushings and billet mounting brackets with the included hardware. That's it! Enjoy better handling and a crisp front suspension.

SPECIAL NOTE: You can use any conventional automotive bearing grease for service.

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.

Located on the underside of the vehicle, this mount is a critical suspension component that pairs with the upper mount inside the trunk area to securely anchor the suspension system. Together, they help absorb vibrations, reduce noise, and maintain a smooth, controlled ride.

Over time, exposure to road debris, moisture, and everyday wear can weaken this mount, potentially causing increased noise, diminished ride quality, and compromised handling. Replacing a worn or damaged mount is essential to restore suspension performance and maintain vehicle stability.

Located on the underside of the vehicle, this mount is a critical suspension component that pairs with the upper mount inside the trunk area to securely anchor the suspension system. Together, they help absorb vibrations, reduce noise, and maintain a smooth, controlled ride.

Over time, exposure to road debris, moisture, and everyday wear can weaken this mount, potentially causing increased noise, diminished ride quality, and compromised handling. Replacing a worn or damaged mount is essential to restore suspension performance and maintain vehicle stability.