The EBC Ultimax slotted front rotors for the listed Mazda RX-7 application use progressively angled slots to reduce the air noise commonly associated with slotted rotors while promoting cooler brake operation. The slots help pull in air to lower temperatures and clear debris and dust from the pad surface, supporting consistent pad-to-rotor contact and extending pad life under repeated use.
EBC 78-83 Mazda RX7 2.3 (1.1 Rotary)(Rear Drums) Premium Front Rotors