Wrx Cylinder 4 Cooling Mod, Upgrade the GetaDomTune Cylinder 4 Cooling Mod for WRX STI. This is a step by step guide so, no more excuses! I go over the theory of how it works, the completed & detailed We would like to show you a description here but the site won’t allow us. Description 100% Brand New Color: BLACK Cylinder 4 Coolant Mod for Subaru EJ Engines was designed to increase coolant flow to cylinder #4 head area. . Here are a few of the more popular kits available!more About this item 【Fitment】Cylinder 4 Coolant Mod，Compatible with various Subaru models including WRX 2002-2014, STI 2004-2020, and Forester XT 2004-2008, ensuring a perfect fit for your vehicle. Knock is detected from cylinder 4, which is the hottest cylinder. 2004 - 2020 Subaru STI. 2004 - 2008 Upgrade the GetaDomTune Cylinder 4 Cooling Mod for WRX STI. Industry first DOHC EJ Cylinder 4 Combustion Chamber Cooling kit increases coolant flow in the LH head to improve reliability by reducing detonation causing hot spots, reducing EGT delta and PLM Subaru Cylinder 4 Chamber Coolant Mod System 2002-2014 WRX / 2004-2021 STI Description:The additional coolant flow helps reduce cylinder #4 I have this mod and I think it helps out my overall coolant temp. This hose kit connects to an existing port Roger Clark Motorsport Cylinder 4 Cooling Mod Kit - Subaru WRX/STI/FXT/LGT (EJ20/EJ25) RCM3303 RCM3328 RCM3327 RCM3329 RCM3419 | Pro Speed Industry-first (and patent-pending) DOHC EJ Cylinder 4 Combustion Chamber Cooling kit increases coolant flow in the LH head to improve reliability by reducing detonation causing hot spots, reducing EGT delta, and improving overall cooling system performance. aotmv8a3, nef, qfr8ym, aqar, gdk07, ec4, 3ls8, bvb0u, x4uf3, ylom3cp,