Bilstein B6 Heavy Duty monotube gas pressure shocks and struts are the ideal choice for most vehicles, including full-size sedans, SUVs and trucks. These shocks provide improved handling and stability, without sacrificing ride comfort. They offer super damping ability that makes them ideal for the driver who demands superior performance, while maintaining an exceptional street ride. *The product benefits at a glance:* * Monotube gas pressure construction * Improved safety and sportiness * Added traction and enhanced stability * Increased durability and performance while maintaining ride comfort * Road-tested and fine-tuned by BILSTEIN for each vehicle specific application PartNumber : bil35-143321 Description : B6 Performance - Suspension Strut Assembly Series : B6 (HD) Boot Included : Blue Bellows Internal Design : Monotube Lower Mount Type : Housing Upper Mount Type : Stem Finish : Yellow Paint Title : Bilstein Shock Absorbers Series : B6 Performance California Proposition 65 : WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov Position : Front Left 2011 BMW 1 Series M Base L6.2979cc Suspension::Shocks and Struts 2008-2013 BMW M3 Base V8.3999cc Suspension::Shocks and Struts