AST Lowering Springs For BMW 4 420i/430i/420D 07/2021-, Front 25 , Rear 20

The AST Lowering Springs for BMW 4 420i/430i/420D 07/2021- represent a meticulously engineered solution designed to enhance vehicle dynamics by lowering the center of gravity while maintaining a high level of ride comfort. Manufactured with precision on advanced Wafios coiling machines, these cold-coiled springs ensure consistent quality and durability, adhering to the rigorous standards expected in automotive performance components.

These lowering springs are tailored specifically for the BMW 4 Series models 420i, 430i, and 420D from 07/2021 onwards, ensuring optimal fitment and performance. By reducing the front ride height by 25 mm and the rear by 20 mm, the springs contribute to improved handling characteristics, enhanced cornering stability, and a more aggressive stance without compromising the inherent comfort provided by the original equipment manufacturer (OEM) suspension setup.

Crafted from premium materials and designed with a progressive spring rate, the AST Lowering Springs offer a balance between sportiness and everyday usability. Their direct replacement design facilitates straightforward installation without the need for additional modifications. Moreover, these springs are supported by a lifetime warranty against breaking, underscoring the brand’s commitment to quality and reliability.

It is important to note that these springs are not suitable for four-wheel drive (4WD) vehicles. Additionally, vehicles equipped with M-sport or Adaptive M-sport suspension systems will experience approximately 10 mm less lowering compared to standard suspension setups.

Lowering Specifications

• Front lowering: 25 mm
• Rear lowering: 20 mm
• Approximately 10 mm less lowering for vehicles with M-sport suspension
• Approximately 10 mm less lowering for vehicles with Adaptive M-sport suspension

Compatibility

• BMW 4 Series 420i (from 07/2021 onwards)
• BMW 4 Series 430i (from 07/2021 onwards)
• BMW 4 Series 420D (from 07/2021 onwards)
• Not suitable for 4WD (four-wheel drive) vehicles

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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.