PERRIN Performance Turbo Inlet Hose for the 02-07 Subaru WRX, 04+ STI, and 04-08 Forester XT. This is an excellent upgrade for those of you who need to replace your factory inlet hose. It is common over time and mileage for your factory inlet hose to develop cracks around the worm clamp connections or around the various hose connections which will cause boost leaks.
2.4 Inlet Diameter