Without making any permanent modifications, the CCV catch can mounts underneath the OEM air intake duct. To retain factory functionality, the CCV catch can runs inline between the crankcase vent (CCV) port and the turbo inlet pipe. At low loads, it experiences atmospheric pressure. However, when the engine is at high load (WOT), the line will experience high flow from the crankcase into the intake system. This would normally lead to oil and sludge accumulation in the air filter intake pipe. The CCV catch can captures this and promotes clean filtered air back into the intake.