02 03 04 05 06 Subaru WRX/STi 2.0L/2.5L Turbo GREEN Piping Cold Air Intake System Kit with Blue Filter 2002-2005 Subaru Impreza WRX with 2.0L Turbo Engine 2004-2006 Subaru Impreza WRX STi with 2.5L Turbo Engine This Cold air intake kit will increase 7-10% of Horsepower and 5-8% of Torque It's the ultimate performance Cold Air intake Kit with higher explosive horsepower output Easy to install and easy to fit with simple tools (A General Installation instruction is included)