This upgrade is designed for those who wish to upgrade the braking performance of their EVO 1-3. The upgrade uses the front brakes that were available as stock on Mitsu Lancer Evolution V-IX. These brakes use much larger 320mm (12.6") EVO 5-9 rotors and much larger EVO 5-9 Brembo 4-piston calipers. (The stock EVO 1-3 rotors are 276mm). The upgrade is for the front brakes only. Complete details can be found in the various product descriptions below.