Performance brake rotor NG. Made in Spain. Designed and developed specifically for increased braking ability and longevity. Bolt-on performance due to less unsprung weight and brake surface materials with coefficient of friction. Computer aided design insures maximum strength and minimum weight. Specially ground to insure perfect concentricity and parallelism prevents warping. CNC billet machined aluminum carriers for accuracy, strength and light weight (where applicable). Laser cutting for accuracy to the ten thousandth of an inch!