Mishimoto MMAI-WRX-01P Subaru WRX/STI Race Air Intake, 2001-2007, Polished Direct fit for the 20012007 WRX and STI CNC-machined air diverter maintains reliable and consistent MAF readings 2.75 diameter pipe for large turbochargers and aggressive tunes Fits stock or aftermarket induction hoses and front-mount intercooler kits Mishimoto Lifetime Warranty