Air and Fuel› Air Cleaners, Filters, Intakes and Components

IAG Performance

Street Series Air/Oil Separator

$499.99

SKU: IAG-ENG-7182

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The IAG Performance V3 Street Series Air/Oil Separator is an engine component designed to safeguard and improve Subaru WRX performance. It features a 1-liter cast aluminum swirl pot canister that significantly improves oil separation from the PCV system. The unique baffling controls crankcase pressure and returns separated oil to the engine. This AOS requires no routine draining or maintenance.
Show original supplier description
The IAG Performance V3 Street Series Air/Oil Separator (AOS) is engineered to protect and enhance your 2015-2021 Subaru WRX engine. Developed through rigorous testing, this AOS offers superior protection by significantly improving oil separation from the PCV system before returning PCV gasses to the intake. Its compact, cast aluminum design has an approximate 1-liter capacity and incorporates a unique baffling system to effectively control crankcase pressure. Unlike simple catch cans, the IAG AOS operates without the need for manual draining or frequent maintenance. Separated oil collects on the canister walls and gradually drains back into the engine's crankcase. The AOS also features an exclusive heating system to prevent sludge formation. The internal gas vortex created by the inlet hoses, combined with the baffles, traps oil and allows clean gas to exit the top. It features dual breather ports with 3 -8 ORB removable billet hose barbs and integrates seamlessly with standard ECU settings. It is compatible with all fuel types and helps prevent oil dilution in ethanol-fueled applications. Please note: The IAG AOS is not compatible with most aftermarket strut tower bars.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandIAG Performance
Part NumberIAG-ENG-7182
CategoryAir and Fuel
5,000+ Trusted brands
1M+ Enthusiasts
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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