Catch Can Kit Crankcase for Ford Focus ST 15-18 Fluid Lock Radium Engineering - USA-RAD-20-0357-FL - Focus Eco Boost Catch Can Kit Details Radium Engineering catch cans feature large 10AN ORB ports, a 4AN ORB drain port, 2-step oil separation baffling, and an O-ring sealed dipstick. These kits mount using factory holes and integrate perfectly with the surrounding components. These two oil catch cans (PCV  and CCV) function completely independent of each other and are sold individually or together. They do NOT vent to atmosphere (VTA), thus are emissions and track legal. Closed loop systems remove the oil and sludge from the PCV gasses before it is routed to the engine to be burned. A closed loop system also promotes negative crankcase pressure for optimal performance. Furthermore, closed systems prevent unwanted oil vapors from entering the cabin. The dipsticks built into the catch cans allow easy inspection of accumulated fluid. No cutting, drilling or permanent modification to the vehicle is required. 20-0357-FL Compatibility: 15-18 Focus ST These catch can kits mount on the back LH side of the engine bay. 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: -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  Instruction PDF