31136 UNIVESAL Aluminum Alloy Reservior Oil Catch Can Tank for BMW N54 335 1.An oil catch tank is used in turbo applications, or high-performance racing applications where excessive blow-by (leakage past the piston rings) of air and fuel vapor occurs. 2.This creates a positive pressure in the crankcase. 3.During engine operation, blow-by gases, as well as oil mist from the rotating components of the engine, pass through the PCV valve and are routed back into the intake for the engine to burn off. 4.However, some of the oil mist and other by-products settle along the engine intake and over time form a gunk. 5.The oil catch tank collects such oil mist and condenses the fuel vapors while allowing cleaner gases to be passed back into the intake. Features: Universal fitments, can fit on most cars(not only for bmw). Ensure better mileage, better performance and preserve engine life. Built-in air filter included Specifications: Color: Black Material: Aluminum alloy Tank connector: OD=19MM FITMENT: FOR BMW N54 335 FOR2006-2011 E90 Sedan 335i / 335xi FOR2006-2011 E91 Touring 335i / 335xi FOR2006-2012 E92 Coupe 335i / 335xi / 335is FOR2007-2012 E93 Convertible 335i / 335xi FOR2008-2010 E60 Sedan 535i / 535xi Package List: 1 * Oil Catch Can All items are New unless stated otherwise on the listing. We sell DIY (Do It Yourself) Items with a few exceptions. We take no responsibility in teaching you how to install. Professional installation is strongly recommended.