I have the PMC oil filter housing on my 330i track car. After the first oil change I replaced the gaskets and it started leaking after a couple track days. The gasket had failed so I had to order another set of gaskets. $10 each plus $10 shipping. And nobody else has them so you want to have a couple extra sets on hand. All in all this is a quick way to add an external oil cooler. But adds a potential weak spot in the system. The guys at Drift HQ were very helpful.