The Brembo Xtra Brake System is a high quality product for use in either every day traffic conditions or for the high speed motorway, it is at home in every situation. The Pillar Venting Technology keeps the temperatures to an acceptable level in the hardest of braking situations, fading has been reduced or even made a thing of the past. This disc comes to use in the GT Kits and is made to be used in conjunction with high quality brake pads as for example EBC Red- or Yellowstuff and Ferodo DS2500 & DS3000. Not even the best disc is invunerable. To run the brakes in please read the enclosed papers before setting off on your first journey with your new discs. Never park your car after a hefty drive "down the road", they will distort, always do a "cooling run" so that the discs can cool sufficiently before packing up for the night. Also helpful, every now and again it would be helpful to clean the vents and holes of the discs, do not use anything that will damage the anti-corrosion coating, compressed air or even water will do the job just fine. Price for 2 discs!