2002-2007 Subaru Impreza WRX/STi Upgrade Top Mount Intercooler+Y-Pipe Kit TMIC GD End to End Dimensions: 22" x 11.5" x 3.75" Intercooler Core: 20" x 7.5" x 3.75" Inlet (ID / OD): 2.5" Compressed Air Flow Rate: 850 CFM; up to 500 BHP Blow-off Valve Flange: Stock, Pressure Drop: 0.2@15psi