Ford Focus RS Oil Catch Can Kit by Radium Engineering Install The Radium Engineering Dual Oil Catch Can Kit onto your Ford Focus RS or ST and protect your engine from elevated levels of crankcase / PCV blow-by which accumulates from high performance driving. The Radium Engineering Dual Oil Catch Can Kit for the Ford Focus RS / ST mounts using factory holes and integrates perfectly with surrounding components. This closed loop system promotes negative crankcase pressure for optimal performance while preventing unwanted vapors from entering the motor. A supplied dipstick built into the can allows for easy inspection of accumulated fluid. Excessive oil collection can be an indicator of a damaged motor. This kit allows for the installation of the PCV side oil catch can and the crankcase side oil catch can giving you dual protection from oil build up Radium Engineering Oil Catch Can Features:Raises the octane and increases engine performance from cleaner inlet air Prevents oil buildup in the intake and intercooler system walls, throttle body and intake manifold Lowers hydrocarbon emissions6 fluid ounces of capacity