AST Lowering Springs For BMW 4 xDRIVE 420i/428i/430i xDRIVE 03/2014-07/2021, Front 40 , Rear 35 Category_STYLING ALL resulting in consistent performance and

resulting in consistent performance and longevity

Check out the full kit installation:

the AST springs offer a progressive spring rate that balances performance with everyday usability

these front duct covers are the perfect solution

AST Lowering Springs For BMW 4 xDRIVE 420i/428i/430i xDRIVE 03/2014-07/2021, Front 40 , Rear 35 Category_STYLING ALL resulting in consistent performance andThe AST Lowering Springs are engineered to enhance your BMW 4 xDRIVE 420i 428i 430i xDRIVE (03 2014 07 2021) by lowering its center of gravity, thereby improving handling and stability without compromising ride comfort. Manufactured using advanced cold coiling technology on premium Wafios machines, these springs ensure exceptional durability and performance. Designed specifically for the front and rear suspension, with a lowering specification of 40