Eibach E90-20-031-08-22 B12 Pro Kit

Overview of the Eibach E90-20-031-08-22 B12 Pro Kit

The Eibach E90-20-031-08-22 B12 Pro Kit is a premium suspension upgrade designed specifically for the BMW 4 Series (E90) and its derivatives. This kit replaces the factory coil springs and shock absorbers with high‑performance components that deliver improved handling, reduced body roll, and a more engaging driving experience.

Key Components Included

• Four B12 Pro Springs – engineered for a 20 mm lower ride height and enhanced stiffness.
• Four B12 Pro Monotube Shock Absorbers – featuring adjustable damping settings to suit both street and track use.
• Installation Hardware – all necessary bolts, spacers, and mounting brackets for a complete fitment.

Performance Enhancements

The B12 Pro Kit is built on Eibach’s proven B12 platform, known for its balance between comfort and performance. By lowering the vehicle by 20 mm, the kit reduces the center of gravity, which translates to:

• Improved Cornering – tighter steering response and reduced understeer.
• Reduced Body Roll – thanks to stiffer springs and tuned shock damping.
• Enhanced Road Feedback – a more direct connection between the tires and the road surface.

Damping Characteristics

The monotube shocks feature a dual‑range damping system. The first range offers smooth, compliant behavior for everyday driving, while the second range provides aggressive compression and rebound control for spirited sessions or track days.

Installation Overview

Installing the B12 Pro Kit is a straightforward process that can be completed with standard hand tools. The kit’s design aligns with OEM mounting points, ensuring a seamless fit without the need for extensive modifications.

1. Remove Factory Springs and Shocks – detach all existing suspension components from both front and rear.
2. Install B12 Pro Springs – secure each spring using the supplied bolts and spacers, ensuring proper alignment.
3. Mount Monotube Shock Absorbers – attach the shocks to the designated brackets, tightening all fasteners to specification.
4. Adjust Damping Settings – set the desired damping range on each shock using the built‑in adjustment screws.
5. Recheck Alignment – verify that all components are correctly positioned before driving.

Compatibility and Fitment

The kit is engineered for the following BMW models:

• BMW 4 Series (E90) – including coupe, convertible, and touring variants.
• BMW 5 Series (E60/E61) – with minor adjustments for certain trim levels.
• BMW 6 Series (E63/E64) – where the suspension geometry matches the E90 platform.

All components are manufactured to OEM specifications, guaranteeing a perfect fit and preserving factory safety standards.

Benefits Over Factory Suspension

• Lowered Ride Height – 20 mm reduction improves aerodynamics and handling.
• Enhanced Stiffness – springs are engineered to reduce flex, providing a more predictable chassis response.
• Improved Damping Control – monotube shocks offer superior temperature stability and consistent performance under load.
• Long‑Term Durability – high‑grade materials resist wear and corrosion, extending component life.

Maintenance Tips

While the B12 Pro Kit is designed for durability, regular checks will ensure optimal performance:

• Inspect Shock Oil Levels – verify that oil remains within the recommended range; replace if contaminated.
• Check Spring Tension – periodically confirm that springs maintain their specified preload.
• Monitor Alignment – after any significant impact or road incident, have a professional alignment performed.

User Experience Highlights

Owners of the B12 Pro Kit frequently report:

• A noticeable reduction in body roll during aggressive cornering.
• More precise steering feedback that enhances confidence on winding roads.
• Comfortable ride quality for daily commutes, thanks to the dual‑range shock settings.

Conclusion

The Eibach E90-20-031-08-22 B12 Pro Kit delivers a comprehensive suspension upgrade that balances performance and everyday usability. By integrating high‑quality springs and monotube shocks, the kit transforms the driving dynamics of the BMW 4 Series, offering enthusiasts a tangible improvement in handling, stability, and overall vehicle feel.