AST Lowering Springs For BMW 5 550 03/2010-01/2017, Front 40 , Rear 35 E39 520i Triple-adjustable coilover setup - fine-tune

Triple-adjustable coilover setup - fine-tune rebound and compression independently for optimum chassis balance

chassis stability upgrade

3 inch BMW boost pipe

4 TSI CTKA from 2008 onward on vehicles without a GPF

AST Lowering Springs For BMW 5 550 03/2010-01/2017, Front 40 , Rear 35 E39 520i Triple-adjustable coilover setup - fine-tuneThe AST Lowering Springs are engineered to enhance the driving dynamics of your BMW 5 550 (03 2010 01 2017) by effectively lowering the vehicles center of gravity. Manufactured with precision using premium materials and cold coiled on state of the art Wafios coiling machines, these springs provide a reliable and durable solution for enthusiasts seeking improved handling without compromising ride comfort. Designed as a direct replacement for the OEM