AST Adjustable Lowering Spring Kit for BMW G29 Z4 & Toyota A90 Supra | ALS Kit

With this set of Height Adjustable Lowering Springs, you’re not limited to a fixed lowering range. Thanks to the precision-engineered AST height adjuster, you can fine-tune your ride height even after installation, providing ultimate flexibility and control over your setup. The AST Adjustable Lowering Springs lower your vehicle’s centre of gravity while maintaining the comfort and refinement of the factory suspension. Developed as a direct replacement for OEM springs, each kit is tailored specifically for the vehicle application and crafted using premium materials on industry-leading Wafios coiling machines. The progressive spring design achieves the ideal balance between a sportier stance and enhanced driving performance. Proudly made in the Netherlands, Europe.

Key Features

• Adjustable ride height allows post-installation fine-tuning

• Progressive spring rate for comfort and performance balance

• Direct replacement for OEM springs – no compromise on ride quality

• Crafted on advanced Wafios coiling machines from high-grade materials

• Manufactured in the Netherlands to the highest standards

Fitment Notes

• Lowering amount may vary depending on vehicle model and equipment

Compatibility

• BMW Z4 (G29) – All models including sDrive20i, sDrive30i, and M40i

• Toyota Supra (A90) – All models from 2019–Present

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

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All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.