Centric premium rotors utilize an Electrocoating finish that provides long lasting corrosion protection. E-coating is a superior electro-statically applied finish designed to withstand 400 hours of salt water exposure without rusting. Phosphate finishes utilized by other manufacturers provide only minimal protection from the elements; these finishes are generally only effective for the shipping and storage portion of a rotor’s life. The addition of heat and moisture eliminates the effectiveness of phosphate finishes resulting in immediate corrosion once installed in the vehicle. Premium e-coated rotor with advanced metallurgy that greatly reduces pad squeal; Especially effective with higher friction, European style brake pad compounds; Added Molybdenum and Chromium to resist rotor cracking 2012 - 2015 BMW 335i, 2013 - 2013 BMW 328i xDrive, 2013 - 2015 BMW ActiveHybrid 3, 2013 - 2016 BMW 335i xDrive, 2014 - 2015 BMW 335i GT xDrive, 2014 - 2016 BMW 435i, 2014 - 2016 BMW 435i xDrive, 2015 - 2016 BMW 435i Gran Coupe, 2015 - 2016 BMW 435i xDrive Gran Coupe, 2016 - 2017 BMW 340i, 2016 - 2017 BMW 340i xDrive, 2017 - 2017 BMW 340i GT xDrive, 2017 - 2017 BMW 440i, 2017 - 2017 BMW 440i Gran Coupe, 2017 - 2017 BMW 440i xDrive, 2017 - 2017 BMW 440i xDrive Gran Coupe