Ram air air cleaner breather

Did cyl pressure test about 2 years, 6,ooo miles ago and was 120 wthin 10 across the cyl with very big overlap on cam, didn't do leak down. smaller cam now, when return from work overseas will try leak down test. still no issue at high rpm in lower gear at lower speeds, that was why Iwondered if cowl induction pushing air thru breather hose over pressurizing valve cover gasket capabilities