AST Lowering Springs For BMW 4 420i/428i/430i/420D/425D 03/2014-07/2021, Front 30 , Rear 30 1 Freer flowing intake path for

Freer flowing intake path for improved response and more eager acceleration

Stick on tailgate trim for F36 2013 2014 2015 2016 2017

Smooth-flowing pipework for improved response and enhanced drivability

Vented vanes improve heat dissipation to help resist fade during fast road driving

improve pedal feel

AST Lowering Springs For BMW 4 420i/428i/430i/420D/425D 03/2014-07/2021, Front 30 , Rear 30 1 Freer flowing intake path forThe AST Lowering Springs are precision engineered to enhance your BMW 4 Series driving experience by lowering the vehicles center of gravity while maintaining a high level of comfort comparable to the original equipment manufacturer (OEM) springs. Manufactured using state of the art Wafios coiling machines, these springs are cold coiled to ensure optimal durability and performance. Their progressive design allows for a balanced reduction in ride