I own a 911 turbo pdk and i recently installed the following:
1) ams intercoolers
2) ams y-pipe
3) upgraded stock frame turbos

My car was tuned using cobb. Powerwhise, the car did not unleash its full potential yet due to the limit of the pdk clutch. However, since it was tuned i started facing many oil leaks. It first started with the oil seperator and the o-rings. After fixing those i pushed the car a couple of times and oil started leaking from the top of the engine from a part called the "breather". This only indicated to me that a lot of pressure started building up in the engine and I would like to know if there is any upgrades to be done to avoid such issues. keeping in mind that the car is 5 old.
I kindly ask for help.

Thank you