Perrin Thermostatic Oil Cooler KitNote: 2001 2007 WRX and STI will require Subaru Part Number 21328AA140, the coolant crossover pipe for installation. For all vehicles, an existing hole on lower frame will need to be enlarged and therefore tools and mechanical knowledge are necessary. Reduce engine oil temperatures, extend engine life, and keep your horsepower consistent with a PERRIN Oil Cooler. Why You Want This In racing conditions engine oil temperature skyrockets. This causes
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