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 328i, 2013 - 2013 BMW 328i xDrive, 2014 - 2015 BMW 228i, 2014 - 2015 BMW 328d, 2014 - 2015 BMW 328d xDrive, 2014 - 2016 BMW 428i, 2014 - 2016 BMW M235i, 2015 - 2015 BMW 228i xDrive, 2015 - 2016 BMW M235i xDrive, 2016 - 2016 BMW 428i Gran Coupe, 2016 - 2016 BMW 428i xDrive, 2016 - 2017 BMW 320i, 2017 - 2017 BMW M240i, 2017 - 2017 BMW M240i xDrive