Manufactured using premium disc blanks mentioned above, the narrower multi slot design of the Ultimax sport rotor and the progressive angle at which the slots are machined creates a quiet running sport rotor that still has benefits of removing gas, dirt, water and debris and maintaining parallel pad wear.
EBC have always been honest enough to say that the biggest advantage of slotted rotors is the fact that they promote flat and parallel pad wear rather than allowing ridges to develop on pads and rotors which is typical of "drilled only" sport rotors. By preventing these ridges brakes stay more consistent throughout pad and rotor wear life (simple physics!).
All EBC sport rotors are final machined in the UK and many of the castings used in EBC rotors are also UK made. In manufacture the EBC rotors are 100% run out inspected to a maximum of 0.1 mm total indicator reading or 0.004 inches and should be run out checked after install on your car. If your car develops brake vibration after 3000-4000 miles this will be due entirely to a run out issue which happens on one in seven road vehicles. EBC brakes now produces all of its GD series and USR discs with a new, long lasting corrosion resistant finish. The coating is either the world famous thermic or for less popular smaller batch items we use the new NITROTHERM