K&N 57i Short Ram Intake Kit Subaru WRX / STI 2002-2007 Vehicle Model_370Z you must check retainer to

you must check retainer to valve guide clearence

this intake produces a noticeable increase in induction sound

Brian Crower valve train components are a great choice for your STI - they are top quality at an unbeatable price

Skunk2's MegaPower Exhaust systems for the Honda Civic Si were developed with this in mind and is based off of more than 15 years' worth of racing experience

If the ACT clutch is designated as part of a conversion kit

K&N 57i Short Ram Intake Kit Subaru WRX / STI 2002-2007 Vehicle Model_370Z you must check retainer toPart #: 57 0626 The K&N 57i Series Induction kit for the Subaru WRX & STI combines the efficiency of a high flow K&N air filter and mounting adapter with the factory Subaru intake tract. K&N utilizes their largest signature conical air filter able to fit for maximize filtration. The air filter is attached to a rotationally molded, high density, polyethylene velocity stack to enhance the intake charge by creating an efficient air stream free of power