AST 5100 Series Coilovers | 2007-2013 BMW M3 (ACC-B1605SD) YMM_2002_2009_Honda_Fit_Aria_GD the springs are engineered with

the springs are engineered with a progressive coil design to optimize ride comfort and handling

The design features precision-molded bushings that fit perfectly into the factory mounting points

Crafted from hand-laid high-gloss carbon fiber

It is perfect for those seeking a high-performance upgrade that offers increased durability

AST 5100 Series Coilovers | 2007-2013 BMW M3 (ACC-B1605SD) YMM_2002_2009_Honda_Fit_Aria_GD the springs are engineered withAST 5100 Series Coilovers 20072013 BMW M3 Part #: ACU B1603SD Overview The AST 5100 Series Coilovers are a high performance suspension upgrade designed specifically for the 2007 2013 BMW M3. Whether you're a dedicated track enthusiast, a spirited street driver, or someone seeking a versatile setup that balances both comfort and performance, these coilovers are an excellent choice. They are engineered to enhance your vehicle's handling, stability, and