Can someone explain the benefits of an oil cooler? other than "cooling the oil"? Hehe. Looking at how expensive they are (STi, Blitz, etc), I thought about making one myself. Just eyeballing, I'm thinking that it'll only cost me about $300 to make one x2 as big as the STi oil cooler. Oh, and if anyone knows exactly what parts I need. I just got some race-only catalog and it's got some cheap ass stuff! Thanks in advance!