Function: I. To reduced the oil vapors from going back into the air intake pipe. II. The oil vapors contaminate the air intake pipe by mixing with the air and fuel that are used to create combustion in the engine. III. As a result of this contamination, it reduces burning efficiency, increases detonation risk, and power factor in both N/A and turbo cars. IV. Enable a turbo car to increase approximately additional 3psi of boost without the risk of detonation.