BMW 4 Series Air Suspension Kit - Rear - Air Lift - Double-bellow Air Springs, 30 Levels of Damping Adjustability - 2021. A purpose-built rear air suspension kit from Air Lift Performance that gives BMW 4 Series owners precise ride-height control and a broad range of damping settings for street, show, or track use.

This rear kit uses double-bellow air springs and threaded-body monotube shocks to deliver controllable drop and consistent damping under load. The system is designed to reduce unsprung weight compared to some stock coil setups, offer maximized wheel travel, and provide a customizable balance between comfort and performance. Components are dyno-tested and paired, and the shocks feature 30 levels of damping adjustability so you can tune from soft daily driving to firmer track-oriented settings.

Features

• Double-bellow air springs — large range of ride height adjustment
• Threaded-body monotube shocks with 30 clicks of damping adjustment
• Adjustable lower perches to separate ride height from air pressure
• Dyno-tested and matched dampers; rig-tested components for longevity
• One-year unlimited-mileage warranty from Air Lift Performance

This kit is aimed at enthusiasts who want the versatility of air suspension without sacrificing handling. Installation requires proper setup and corner balancing to get the most from the adjustable damping and ride-height options; our technicians can assist with tuning to your driving preferences.

If you have questions or want help choosing the right setup, call us directly: 512-982-9393 (TX) or 562-981-6800 (CA). We have two locations offering installation and customization services in Austin, Texas and the Los Angeles, California area and we install on premises at both locations. If you're thinking about purchasing multiple items, please contact us for shipping discounts.

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