Seller notes

For Subaru WRX STI EJ20 / EJ25 Engines Cylinder 4 Coolant Mod Cooling Mod KitItem Description:100% quality assurance tested, more responsive, less expensive, easier to install.Increase coolant flow.Reduce knock and detonation.Reduce cylinder temps.Reduce detonation causing hot spots.Reduce EGT delta.Improving overall cooling system performance.Fitment:For DOHC EJ20 / EJ25 engines.(Fit all EJ20 / EJ25 engines 4 cylinder years and models except 2010+ LGT)For 02-14 Subaru WRX.For 04-on Subaru STI.F...

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