Mishimoto MMICP-WRX-15P Charge Pipe Kit (Subaru WRX, 2015) Direct fit for the 2015+ Subaru WRX Pipe Diameter: ID = 2.19 at turbo, 2.6 at intercooler hose / OD = 2.75 at intercooler hose 10% faster spool-up with no other modifications No additional tuning required Mishimoto Lifetime Warranty