Fitment Information: This Verus air oil separator is a perfect fit for 2015 - 2021 Subaru STI models. Features: With the Verus Engineering Air Oil Separator (AOS), you can keep your intake system oil - free. Oil in the intake system lowers octane, which may cause detonation, power loss, and carbon build - up. This AOS filters both the crankcase vent and the intake filter through a single unit. It's equipped with four 5 - micron coalescent filters (one on each inlet and outlet), baffling, and stainless mesh, offering top - notch air filtration for the crankcase air. It installs just like an OE component, no tune or setup changes needed. There's an optional coolant hook - up kit that circulates hot coolant through the AOS to reduce condensation in cold months. It comes in anodized Black, Red, or Blue. Key features include: Designed to stop oil from entering the intake system, CNC Machined from 6061 - T6, Mil - Spec O - Ring Bosses, Anodized for corrosion resistance, CNC Laser Engraved, Four 5 - Micron Coalescent Filters, Filters particulates larger than 5 microns, Stainless Mesh to condense oil vapor, Baffles for better oil particle separation, Includes all necessary parts for an easy install, and is Made in the USA. What's Included: An assembled AOS (with 4 Coalescent Filters, internal baffling, and stainless mesh), a sheet steel bracket for VA Chassis (LHD only), 3/4' Rubber Hose, 1/2' Rubber Hose, 3/8' Rubber Hose, and an installation hardware kit. Please note: Anodized parts may fade over time due to engine bay heat.
Using your Verus Air Oil Separator is a breeze. First, locate the appropriate spots for installation on your 2015 - 2021 Subaru STI. The separator comes with all the necessary parts, so just follow the included instructions to install it like you would an original equipment component - no need to change the tune or setup. If you live in a colder area, consider using the optional coolant hook - up kit. Connect it to let hot coolant flow through the AOS and reduce condensation. As for maintenance, keep an eye on the filters. The four 5 - micron coalescent filters are doing a great job of filtering out larger particles, but over time they might get dirty. You may need to clean or replace them. Also, be aware that the anodized parts can fade because of the heat in the engine bay. If you notice any fading, it's just a cosmetic issue and won't affect the performance of the separator. Enjoy a cleaner intake system and better engine performance with your Verus Air Oil Separator.
