AST Lowering Springs For BMW 4 435i/440i/430D 03/2014-07/2021, Front 30 , Rear 30

The AST Lowering Springs are engineered to enhance your BMW 4 Series 435i, 440i, and 430D models from 03/2014 to 07/2021 by effectively lowering the vehicle's center of gravity by 30 mm at both the front and rear. Manufactured with precision using the highest quality materials and cold-coiled on state-of-the-art Wafios coiling machines, these springs provide a reliable and durable solution tailored specifically for your vehicle.

Designed as a direct replacement for the OEM springs, the AST Lowering Springs maintain much of the original comfort while improving handling and stability. The progressive spring design ensures a balanced ride, reducing body roll and enhancing cornering performance without compromising daily driving comfort. These springs are suitable for a wide range of applications, reflecting AST’s commitment to quality and performance across more than 2500 vehicle models from 1966 to present.

In addition to their superior engineering, these springs come with a lifetime warranty against breaking, underscoring the brand's confidence in their durability and long-term reliability. This warranty provides peace of mind and assurance of quality for every journey.

Notes

• Not suitable for 4WD (four-wheel drive) cars.
• Approximately 10mm less lowering for vehicles equipped with M-Sport suspension.
• Approximately 10mm less lowering for vehicles equipped with Adaptive M-Sport suspension.

Lowering Specifications

• Front lowering: 30 mm
• Rear lowering: 30 mm
• Progressive spring design for optimal balance between performance and comfort
• Cold-coiled manufacturing process ensuring high precision and durability

Compatibility

• BMW 4 Series 435i (03/2014 - 07/2021)
• BMW 4 Series 440i (03/2014 - 07/2021)
• BMW 4 Series 430D (03/2014 - 07/2021)
• Not compatible with 4WD vehicles
• Adjustments in lowering height for M-Sport and Adaptive M-Sport suspensions

The AST Lowering Springs represent a professional-grade upgrade that enhances your vehicle’s dynamic capabilities while respecting the comfort and quality standards expected by discerning drivers. Their precise fitment and reliable performance make them an excellent choice for those seeking to improve their BMW’s handling characteristics without sacrificing ride quality.

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.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

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.