RAM AIR SYSTEM | SUBARU | IMPREZA | GDA・GDB | 2000 ~ 2005 | 2.0 LITER | FR-0406GruppeM have adopted a high capacity RAM AIR SYSTEM, also known as cold air intake (CAI) that elegantly makes full use of the Subaru GDA GDB Impreza engine bay drawing in the greatest amount of ambient air possible. Their proprietary double carbon fiber heat shields reduce heated air from entering the intake stream, resulting in lowered intake air temperatures (IAT) delivering increased power and providing a sharp increase in response and that