**Service performed on YOUR rotors that are sent to Defined Autoworks**

Scalloping a rotor provides increased intake port duration. This gives a longer period of time for the engine to beathe during the intake cycle. Adding this to a streeport setup will give similar results of a bridgeport but with a less aggresive driving characteristic. Adding this to a bridgeport will provide even more intake duration more similar to a full peripheral port engine. Please see our knowledge resource tab for more information regarding port type.