Bilstein B6 46mm monotube rear shock for 2008–2013 BMW M3 and 2011 BMW 1 Series M (without electronic suspension). B6 Performance dampers are tuned upgrades to OE shocks designed to work with the factory springs, improving safety and handling without requiring new springs. The monotube design and application-specific valving provide vehicle-specific ride tuning and firm, controlled road manners.
Bilstein 08-13 BMW M3 / 2011 BMW 1 Series M (w/o Elect. Susp.) B6 Performance Rear Monotube Shock