Oil catch can benefits is to captures excess oil and relieves pressure in the crankcase. Oil catch cans also filter oil and other harmful contaminants from building inside the intake, thus hurting fuel economy and horsepower. The NGR Oil Catch Can is designed to keep your PCV system clean by separating oil particles. Designed with a clear tank design, it allows to see how contaminated the oil is. The NGR best oil catch cans uses a stainless steel 40 micron internally baffled system to not only clean but to separate oil from the PCV. Features a 4 port design for both racing and street use. This 4 port design supports 8AN-10AN fittings it allows to relieve more crankcase pressure, if needed for racing/drag use or you can cap off and only use the necessary ports for a street application.