The focus rs front breather goes from front of engine to flametrap to pcv valve to one way valve to back of inlet. The top cam breather goes to oil separator then breathes back to induction pipe with a return to upper sump on bottom of the separator. I removed mine as i never had space after fitting a gt28 so run a will pedley breather to bailey cosworth oil seaprator. Cam breather to bailey separator and return to upper sump. I vent to atmosphere now