How do I adjust the ride height and damping on these coilovers?

Ride height is adjusted using the threaded spring perch on the strut body. The rebound damping is adjusted via a knob on the top of the damper, offering 16 distinct clicks to fine-tune your car's handling characteristics.

What is the benefit of the adjustable camber plates?

The aluminum unibal top mounts allow you to adjust the front camber. This is important for optimizing tire contact with the road, especially when using wider tires or for performance driving, which can improve steering response and grip in corners.

Are these coilovers built to last in different weather conditions?

Yes, the struts feature a galvanized zinc coating for corrosion protection, and the kit includes an integrated dust protection system to prevent dirt and water from reaching the piston rod and seals, contributing to durability.

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Specifications

Brand: ST Suspensions
Part #: 18220804
UPC: 847691055472

ST Coilover Kit 03-08 BMW Z4 (Z85)

Name: ST Coilover Kit 03-08 BMW Z4 (Z85)
Brand: ST Suspensions
SKU: st-suspensions-st-coilover-kit-03-08-bmw-z4-z85-t14-77631
Price: 1794.11 USD
Availability: BackOrder

$1794.11

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2003-2008 BMW Z4. ST XTA Coilover Kit with adjustable damping and camber plates for improved handling.

Key Features

Fits 2003-2008 BMW Z4.
Adjustable rebound damping with 16 distinct clicks allows you to fine-tune the driving dynamics.
Aluminum unibal top mounts enable front axle camber adjustment for improved steering response and tire contact.
Composite spring perch with a stainless steel insert prevents corrosion and ensures long-lasting height adjustability.
Linear race spring system provides consistent response and allows for easier spring rate personalization.
Galvanized steel struts offer improved resistance to corrosion.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

If you're looking to dial in the suspension on your 2003-2008 BMW Z4 for serious performance driving, the ST XTA Coilover kit is a solid choice. This kit replaces your factory struts and springs with adjustable units, allowing you to precisely control both ride height and damping characteristics. It's designed to give you more grip and better handling, especially when you're pushing the car through corners.

What sets the XTA kit apart is the combination of features for fine-tuning. You get aluminum top mounts that let you adjust the front camber, which is crucial for optimizing tire contact patch and steering response. The kit also includes linear race springs for consistent performance and dampers with 16 clicks of rebound adjustment, so you can really dial in the feel of your ride, whether you want it firmer for track days or a bit softer for spirited street driving. The spring perches are made from a durable, friction-optimized composite with a stainless steel insert, which helps prevent corrosion and makes height adjustments easier over time. Plus, the galvanized steel struts offer good corrosion protection.

These coilovers are built by hand at KW in Germany, and each damper is tested on a shock dyno before it leaves the factory. The kit also includes an elastomer bump stop with integrated dust protection to keep dirt and water away from the sensitive internal components, helping to ensure long-term reliability. You'll also find a detailed setup manual included, making it easier to get the most out of the adjustable damping.