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. Symmetric vane; split-core castings for uniform heat distribution. Black E-Coat anti-corrosive coating protects much better than competitors spray paint. Double disc ground friction surface for optimal performance and serviced life INFINITI FX50 2013-2009, G37 2013-2008, M35h 2013-2012, M37 2013-2011, M56 2013-2011, Q50 2022-2014, Q60 2022-2014, Q70 2019-2014, Q70L 2019-2015, QX70 2014, Nissan 350Z 2009, 370Z 2020-2009, Z 2023