The HKS Super Mega Flow (SMF) Reloaded intake is a complete kit for the 2002-07 WRX & STI and includes all mounting hardware and adapters. The SMF intake is a short ram that attaches to the factory MAF hose and installs in place of the stock WRX & STI air box. HKS's patented Super Funnel design pushes as much air as possible while the massive filter & filter cage allows for 30% more intake surface area. The HKS SMF filter is a 3-later density dry foam element for optimal flow and zero effect on the MAF sensor. The piping on the intake is plastic to prevent heat soak; don't let it fool you - this is not some cheapo intake. The HKS WRX & STI SMF Reloaded Intake has an 80mm diameter inlet & 200mm diameter filter.