AST Lowering Springs For BMW 4 420i/428i/430i/418D 07/2013-10/2020, Front 40 , Rear 40

The AST Lowering Springs for BMW 4 Series models 420i, 428i, 430i, and 418D (07/2013–10/2020) represent a precise engineering solution designed to enhance vehicle dynamics by lowering the center of gravity without significantly compromising ride comfort. Manufactured with meticulous attention to quality, these springs are cold-coiled using state-of-the-art Wafios coiling machines, ensuring consistent performance and durability. The front and rear springs each provide a lowering of 40 mm, delivering a balanced stance and improved handling characteristics.

Developed specifically for these BMW models, the AST Lowering Springs serve as direct replacements for the original equipment manufacturer (OEM) springs. Their progressive design allows for a refined balance between sportiness and comfort, maintaining the driving experience that BMW owners expect while enhancing the vehicle's stability and cornering capabilities. The use of premium materials and advanced manufacturing techniques guarantees longevity and resistance to fatigue, supported by a lifetime warranty against breaking.

These lowering springs are suitable for a wide range of applications, reflecting AST’s extensive expertise in suspension components across more than 2500 vehicle models since 1966. They are engineered to meet high business standards, providing a reliable upgrade for professionals and enthusiasts seeking performance improvements without sacrificing daily usability.

Please note that these springs are not compatible with four-wheel drive (4WD) vehicles. Additionally, vehicles equipped with M-Sport or Adaptive M-Sport suspensions will experience approximately 10 mm less lowering than standard models, an important consideration for precise fitment and ride height expectations.

Lowering Specifications

• Front lowering: 40 mm
• Rear lowering: 40 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 (07/2013–10/2020)
• BMW 4 Series 428i (07/2013–10/2020)
• BMW 4 Series 430i (07/2013–10/2020)
• BMW 4 Series 418D (07/2013–10/2020)
• Not suitable for 4WD (four-wheel drive) vehicles

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