Description
Torque Solution Throttle Body Hose Coupler Subaru WRX 2002 2007 STI 2004 2021 TS SU 305 Crosstrek_2013 2017 this performance upgrade opens at this performance upgrade opens at a lower temperature to allow coolant to circulate through the engine earlier The 3 port systems works by interrupting the boost signal traveling from the turbo to the wastegate