AST Lowering Springs For BMW 4 420D/430D xDRIVE 07/2021-, Front 40 , Rear 40 CAN HOLDERS - 2x M Performance Side

- 2x M Performance Side Skirt Fins

is the poor fitment due to the nature in which they are made using bent metal tubes

- For B48 & B58 engines

DOES NOT FIT G21 M340i or G23 M440i

Capable of much improved boost response and in some cases with a soft wastegate spring - quicker spool

AST Lowering Springs For BMW 4 420D/430D xDRIVE 07/2021-, Front 40 , Rear 40 CAN HOLDERS - 2x M Performance SideThe AST Lowering Springs for BMW 4 420D 430D xDRIVE 07 2021 are engineered to enhance your vehicles driving dynamics by lowering the center of gravity while maintaining a high level of comfort. Manufactured using cold coiling technology on the advanced Wafios coiling machines, these springs provide a precise fit and reliable performance tailored specifically for your BMW model. Designed as a direct replacement for the OEM springs, the AST Lowering