1L Air Oil Separator

This is crucial to avoid premature mechanical issues, maintain peak performance, and prevent corrosion of rubber and silicone components within the intake system. Oil in the intake can lead to detonation, excessive emissions, smoke, power loss, decreased fuel economy, and potentially severe engine damage. Constructed from lightweight yet sturdy cast aluminum, this 1-liter capacity AOS features a unique swirl pot design and a novel baffle system to efficiently separate oil from PCV gases before they reach the intake. The unit utilizes patented heating technology, integrated with the vehicle's cooling system, to keep the canister warm and minimize condensation and sludge buildup, a common issue with lesser systems. This proactive approach ensures oil separation is effective and prevents reintroduction of contaminants into the engine. Unlike traditional catch cans that require regular draining, the IAG AOS is maintenance-free. Separated oil naturally drains back into the engine's crankcase. The system complements the OEM PCV system, enhancing its capacity and directing PCV gases to the turbo inlet via an improved check valve for better suction and separation. It also minimizes oil dilution in ethanol-fueled applications by removing fuel vapors and reintroducing them for combustion. This IAG Performance Air Oil Separator is specifically designed for the following Subaru models: 2008-2014 Subaru Impreza WRX (EJ 2.5L), 2008-2021 Subaru STI (EJ 2.5L), and 2005-2009 Subaru Legacy GT. It is available in a striking red finish to complement your engine bay.