The NRG Oil Catch Can is installed connecting your vehicle PCV Valve or pressure release hose to the intake pipe. This unit captures and stores excess oil coming from valve cover. As a result, clean air is recirculating back into the intake unlike the factory system which puts the release tube directly back into the engine. You can expect a decrease in valve cover pressure prolonging engine life and increasing performance in your vehicle . The NRG Oil Catch Can is a must in any competition car due to regulations concerning oil on the track. If you have any further questions, reach out to one of our experienced representatives.