While on the subject, what do you guys think. Should there be any problems running the provent200 together with the original cdr valve? While i installed the intercooler, i installed a provent also. Summer went and didn't notice any problems. Then winter came and suddenly oil cooler is leaking oil, valve covers are leaking too. Oil cooler seals are probably original, valve cover seals about 13 years old. Seals are old so is it just a coincidence that i have oil leaks or could it be something to do with provent and the additional valve it got? On the plus side there were no oil residue inside the intake with it. I also tried Mishimoto high-flow universal diesel breather. Just because it doesn't have any additional valves in it, but with that Misihimoto, there is some oil residue again inside intake... So what do guys think?