EBC ULTIMAX GROOVED BRAKE DISCS REAR | MAZDA MX5 MK2 (NB) 1.8 (SPORT) 2001-2005The Ultimax slotted rotor range are our premium silent premium street range designed for fast street use and is made using the highest quality G3000 grey iron rotor blanks. EBC Brakes manufacture 92% of everything it sells in its own plants in the UK or USA, thats pretty good for a brake brand, probably the largest in the world. Rather than focus on where that last 8% of bought in components come from we focus on the QUALITY of everything we buy in.