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

Radium Engineering PCV Catch Can Kit – 2013-2018 Ford Focus ST, 2016-2018 Focus RS

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

This catch can kit mounts on the back LH side of the engine bay. The Focus RS requires this kit, while the Focus ST requires kit 20-0357, linked HERE. This is due to different mounting bracket designs necessary because of the subtle changes between the engine bays.

This catch can runs inline with the crankcase breather port. At low loads, it experiences atmospheric pressure, but when the engine is at high load (WOT), this hose will experience high flow out of the crankcase. This would normally lead to oil and sludge accumulation in the air filter intake pipe. Oil accumulation will occur in the intercooler which lowers the thermal efficiency properties of the heat exchanger and leads to decreased performance.

Each kit includes the following:
-An anodized oil catch can with integrated condenser and dipstick
-Anodized laser-cut Focus specific mounting bracket
-Anodized aluminum -AN adapter fittings and hose ends
-Enough PCV hose for custom applications
-Stainless steel mounting hardware