All-in-One Complete Front and Rear Brake Kit Replacement: R1 Concepts eLine Series Front and Rear Brake Kit comes with (4) high performance brake rotors High Performance Brake Rotors: Made of G3000 grade cast iron with rust protection for ultimate rust protection. Built with O.E.M specifications in mind, no modification required. OEM Specifications: Formulated with G3000/G11H18 cast iron specification, these premium brake rotors are engineered to match OEM specifications for durability, reliability, and stability. Non-Directional Finish - Each rotor is prepared with a non-directional finish to promote a faster and more even disc brake pad bed-in, along with quieter and smoother stops for longer lasting, consistent braking performance. Compatible Applications for: (2007-2009) BMW X5 3.0si Sport Utility 4-Door; Front and Rear, (2009-2010) BMW X5 xDrive30i Sport Utility 4-Door; Front and Rear, (2011-2018) BMW X5 xDrive35i Sport Utility 4-Door; Front and Rear, (2014-2018) BMW X5 sDrive35i Sport Utility 4-Door; Front and Rear, (2014-2018) BMW X5 xDrive35d Sport Utility 4-Door; Front and Rear, (2011-2019) BMW X6 xDrive35i Sport Utility 4-Door; Front and Rear, (2015-2019) BMW X6 sDrive35i Sport Utility 4-Door; Front and Rear