GrimmSpeed 1.3 Bar Radiator Cap Type-ALet's face it engine cooling technology can sometimes seem like a dark magic that is impossible for us mortals to understand. That being said, it is well known that raising the pressure in your cooling system has a direct correlation to cooling performance. The factory 1. 1 Bar (16 PSI) cap performs fine for daily driving with a system full of anti freeze, but for those who are looking to push their Subaru harder or run on the track may be running an