Features: 1.Fitment: The cylinder 4 coolant mod is a replacement for Subaru WRX 2002 ? 2014, repalcement for Subaru STI 2004 ? 2020, replacement for Subaru Forester XT 2004 - 2008. 2.Function: The additional coolant flow helps reduce cylinder #4 coolant temps and keeps the temps more uniform with the rest of the cylinders. 3.Practical: This hose kit could helps reduce knock and detonation in cylinder #4, work to protect engine for normal operation, and ensure safe driving. 4.Complete Accessory: The package includes a swivel pipe, a hose and two clamps, complete fittings and metal for a long service life. 5.Easy to Install: Stringently manufactured to meet the original standard, perfect replacement for the old or broken one, improving the time efficiency. Specification: Item Type: Cylinder 4 Coolant Mod Material: Metal Fitment: Fits for All EJ20 EJ25 engines Replacement for Subaru WRX 2002 - 2014 Replacement for Subaru STI 2004 - 2020 Replacement for Subaru Forester XT 2004 - 2008 Replacement for Subaru Legacy GT 2005 - 2009 PackageList: 1 x Adapter 1 x Hose 2 x Tube Clamp