BMW Z4 Sway Bars - Rear - Whiteline - 18mm Heavy Duty Adjustable - `19-`20 are rear anti-roll bars engineered to reduce body roll and sharpen cornering response. These Whiteline bars provide a direct, tunable way to improve lateral grip without sacrificing everyday ride comfort.

Designed for drivers who want predictable handling and adjustable roll stiffness, this 18mm heavy-duty sway bar uses proven Whiteline technology. The assembly distributes lateral loads more evenly across the tires to improve cornering performance and can help reduce uneven tire wear. Mounts use advanced synthetic elastomer with internal bore knurling and grease-retention lips for consistent lubrication. The bar features forged ends for strength, multi-point adjustment to tailor handling balance, protective powder coating for corrosion resistance, and is supplied with extreme-pressure molybdenum disulphide (LM) grease for long service life.

Features

• 18mm heavy-duty rear sway bar, 3-point adjustable for tuning roll stiffness
• Synthetic elastomer bushings with internal knurling and grease retention
• Forged ends and DIY lateral locks to prevent sideways movement under load
• Protective powder coat and anodized alloy components for corrosion resistance
• Includes LM molybdenum disulphide grease and internal grease reservoirs for ongoing lubrication

If you have questions or want help choosing the right setup for your driving preferences, call us directly — we’re happy to discuss fitment and options. We offer installation and customization services at our two locations in Austin, Texas and the Los Angeles, California area. Call 512-982-9393 (TX) or 562-981-6800 (CA) to schedule or for more information. If you plan to purchase multiple items, contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov