An oil catch can is essential on a performance vehicle to protect the engine from elevated levels of crankcase blow-by accumulated from high-performance driving. Excess oil saturated air circulating back into the air intake stream can lead to degraded performance.

This kit is made to run into the PCV system, but there are other options for your application:

Radium Engineering Crankcase Catch Can Kit – 2016-2018 Ford Focus RS

Radium Engineering Dual Catch Can Kit – 2016-2018 Ford Focus RS

Radium Engineering Crankcase Catch Can Kit – 2013-2018 Ford Focus ST

Radium Engineering Dual Catch Can Kit – 2013-2018 Ford Focus ST

This kit is used in both the Ford Focus ST and RS models with the turbocharged EcoBoost engine. It mounts on the front left core support near the radiator.
For clearance purposes, Focus ST installations require Radium 20-0356 Sound Symposer Delete Kit or other symposer delete kit to be installed.

This catch can runs inline with the PCV (positive crankcase ventilation) valve and retains it’s factory function. When the intake manifold pressure is close to or greater than atmospheric pressure, the PCV “check” valve closes and, thus, this hose experiences no flow. Conversely, the PCV hose will experience “metered” vacuum when the engine is idling, steady-state cruising, and decelerating. This would normally draw unwanted crankcase vapor, unspent fuel, and oil sludge into the intake manifold immediately after a high load run. Note: Because the Radium catch cans are pressure sealed, they are great for this boosted application so intake manifold connection is permitted.