GSC EJ WRX/STi Conical High Pressure Valve Spring Kit (5073) Clutch Masters this radiator is the ideal

this radiator is the ideal upgrade from your stock Evolution radiator

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This does not reduce the thermal properties of the shield

GSC EJ WRX/STi Conical High Pressure Valve Spring Kit (5073) Clutch Masters this radiator is the idealGSC Power Division high pressure conical valve spring kit for the EJ WRX and STi includes 16 titanium retainers, 16 conical valve springs and 16 chromoly valve spring seats. High RPM and high boost levels are not a problem on these kits. Vehicle Fitment: EJ20 EJ25 2002 2014 Subaru WRX 2004 2021 Subaru STi 109lbs @ 1. 303" install height 259lbs @ 0. 850" Includes: (16) Titanium Retainers (16) Conical HP Valve Springs (16) Chromoly Valve Spring Seats