Top 20 Best Iag Performance Aos Reviews Comparison

We all know that the best iag performance aos is one of many out there. That’s why we’ve taken 85782 reviews from top experts and organized them according to our rankings for you. 

We know how hard it is to find a great iag performance aos, which is why our team went through the whole research process and put up this list for you. These are just some of their favorites!

We have been exhaustive in our search for the perfect iag performance aos of 2026. If quality matters most, then check this list: 

Bestseller No. 1

IAG Performance Air/Oil Separator (AOS) for Subaru Impreza WRX 06-07, STi 04-07 (Red)

• KEEPING OIL OUT - Keeping oil out of the engine intake tract is extremely important towards preventing premature mechanical failure and maintaining performance. Oil in the intake tract of the engine has several detrimental effects. The oil coats the internal portions of the intake, intercooler, and piping. This oil may cause premature failure of rubber or silicone hoses, which leads to failed connections.
• ORB PORTS - Aluminum body is powder coated in Red or Black Wrinkle Finish. The side of the AOS features 3 -8 ORB removable billet hose barbs. The EJ engine has 3 ports that vent crank pressure: one on each cylinder head, and another on the top of the block. Each engine vent port receives its own connection to the AOS. By giving each engine port its own entrance to the AOS, IAG has allowed for more effective and faster excavation of crankcase pressure.
• SWIRL POT - The IAG Performance AOS' large, 1-liter, cast aluminum swirl pot canister more effectively separates oil from the PCV system upstream of PCV gasses return to the intake system. The IAG AOS' fully-heated cast aluminum housing, superior venting, and unique baffle design set it apart from the rest. The AOS is compatible with all fuel types, extends engine life, improves crankcase ventilation and is compatible with standard ECU calibrations.
• TESTED FOR YEARS - The IAG Performance Street V3 Air / Oil separator (AOS) is an excellent investment to keep your EJ engine running well. The AOS maintains OEM PCV system functionality, but supplements its capacity. The IAG AOS design is based on years of extensive testing on standard and competition applications.
• AOS BODY - Compact cast aluminum design has approximate 1 liter holding capacity integrated.

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Bestseller No. 2

IAG Air Oil Separator AOS for Ford F-150 2017-23 & Raptor 3.5L EcoBoost (Black)

• PROTECT YOUR INVESTMENT - IAG now offers the IAG Air Oil Separator for 2017 - 2023 F-150 & Raptor 3.5L EcoBoost. The IAG AOS is an excellent investment to keep your engine running well. Our design is based on years of extensive research, development and testing. It features a spacious 1-liter cast aluminum swirl pot canister that more effectively separates oil from the PCV system upstream of PCV gasses’ return to the intake system. The heated cast aluminum housing, exceptional venting, and one-of-a-kind baffle design set it apart from the competition. Compatible with all fuel types, prolongs engine life, enhances crankcase ventilation, and works seamlessly with standard ECU calibrations.
• KEEPS OIL OUT OF THE INTAKE - Keeping oil out of the intake is crucial to preventing mechanical problems & maintain engine performance. This is important for the EcoBoost engines that are prone to oil buildup on valves. When oil enters the intake, it coats internal parts like the intake, intercooler, pipes & valves. This causes premature failure of rubber or silicone hoses, which will cause connections to fail. Upon reaching the intake tract, oil can directly enter the intake manifold and the combustion chamber of the engine. Once oil reaches the combustion chamber, it can cause detonation & preignition, smoke, decreased power, lower gas mileage & even catastrophic engine failure.
• MAINTENANCE FREE - The IAG AOS is designed for maintenance-free operation. Unlike conventional catch-can systems, our Air Oil Separators do not require regular draining or upkeep. Once the system is installed, there's no additional maintenance needed. Oil that has been separated accumulates on the inner walls of the AOS canister and gradually flows down by gravity, returning to the engine's crankcase. Our special heating system prevents the collected oil from sludge buildup, ensuring it can be safely reintroduced into the engine. The large volume canister of this Air Oil Separator allows for oil to drain back gradually, eliminating the risk of overflow that smaller catch cans may pose.
• HOW DOES THE AOS WORK? WHAT’S INSIDE? - The IAG Air Oil Separator incorporates a distinctive baffle system that enables the oil suspended in your engine's PCV gasses to gather and return to the crankcase. Each inlet hose is positioned on one side of the AOS canister, which helps to create a vortex of the gasses inside. As the gasses move within the vortex, they pass through a series of baffles that collect the oil, while allowing the gasses to escape from the top of the AOS. Because the OEM PCV operation is maintained, the engine draws an additional vacuum on the AOS assembly, further eliminating the PCV gasses.
• MAINTAINS THE OPERATION OF THE OEM PCV SYSTEM - The IAG AOS maintains the functionality of the OEM PCV system, while supplementing its capacity. The IAG Air Oil Separator PCV discharge gasses return to the turbo inlet, retaining the OEM PCV valve to draw additional suction, which helps to improve air oil separation. In ethanol-fueled applications, our AOS safeguards against oil dilution and lubrication issues by capturing fuel vapors from the oil and redirecting them into the intake tract for combustion. The IAG AOS provides superior protection against both oil entrainment in the intake flow and oil dilution in the engine's lubrication system compared to the OEM PCV system on its own.

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Bestseller No. 3

IAG Air Oil Separator AOS for Ford Bronco 2021+ 2.7L V6 (Red), Made in USA

• INNOVATIVE DESIGN - The IAG Air Oil Separator is now available for 2021+ 2.7L Bronco. The IAG AOS is a smart investment to ensure your engine's optimal performance. Our advanced design is the outcome of years of thorough research, development, and testing. It features a 1-liter cast aluminum swirl pot canister that is designed to optimize the separation of oil from the PCV system upstream of PCV gasses’ return to the intake system. IAG's AOS sets itself apart with its heated cast aluminum housing, exceptional venting, and unique baffle design. Our AOS works with all fuel types, promoting longer engine life, enhanced crankcase ventilation, and compatibility with standard ECU calibrations.
• KEEPS OIL OUT OF THE INTAKE - Keeping oil out of the intake is essential to prevent early mechanical issues and maintain engine performance. When oil gets into the intake, it coats internal parts like the intake, intercooler, pipes, and valves. This can speed up the deterioration of rubber or silicone hoses, leading to failures at the connections. Once it enters the intake tract, oil can flow into the intake manifold and eventually reach the engine's combustion chamber. This can cause problems like detonation, preignition, higher emissions, smoke, reduced power, lower fuel efficiency, and, in extreme cases, catastrophic engine failure.
• NO MAINTENANCE REQUIRED - The IAG Air Oil Separator is designed to operate without the need for maintenance after installation. Unlike standard catch-can systems, our Air Oil Separators do not need regular emptying or upkeep. The separated oil collects on the AOS canister's inner walls and drains back into the engine's crankcase. Our special heating system prevents the oil from forming sludge, ensuring it can be safely reintroduced into the engine. The large capacity of the IAG AOS canister allows oil to drain slowly, which prevents overflow issues seen in smaller catch cans.
• HOW DOES THE AOS WORK? WHAT’S INSIDE? - The IAG Air Oil Separator has a unique baffle system that collects the oil from your engine's PCV gasses and directs it back into the crankcase. The Separator canister was engineered with the inlet hoses on one side, generating a vortex of gasses inside. As these gasses circulate within the vortex, they pass through a set of baffles that capture the oil, allowing the gasses to escape from the top of the AOS. With the OEM PCV system operating normally, the engine draws extra vacuum on the AOS assembly, further reducing PCV gas.
• MAINTAINS THE FUNCTIONALITY OF THE OEM PCV SYSTEM - The IAG AOS maintains the operation of the OEM PCV system while supplementing its capacity. The PCV discharge gasses from the IAG Air Oil Separator are routed back to the turbo inlet. A PCV valve is employed to generate extra suction, enhancing air-oil separation. In applications using ethanol fuel, our AOS provides protection against oil dilution and lubrication problems by capturing fuel vapors from the oil and directing them into the intake tract for combustion. The IAG AOS offers superior protection against oil entering the intake flow and oil dilution in the engine's lubrication system compared to the OEM PCV system by itself.

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Bestseller No. 4

IAG Performance AOS Pitch Mount Bracket fits Subaru 2006-07 WRX/STI, 2004-08 Forester XT

• The IAG Performance AOS (Air Oil Separator) pitch mount bracket is designed to replace the standard mounting bracket included with IAG's AOS kits.
• The 2 piece billet aluminum bracket is CNC machined in our Westminster facility and features all the mounting holes required to relocate the AOS from the passenger side strut tower to the center firewall above the transmission pitch mount. Repositioning the AOS to this location may be necessary for clearance with some front mount intercoolers and rotated turbo kits.
• The IAG AOS pitch mount bracket fits Subaru 2006-07 Impreza WRX and 2004-07 STI as well as 2004-08 Forester XT.
• Includes: (x1) 2 Piece Billet Aluminum Mounting Bracket, (x3) M6x12mm Socket Head Cap Screws
• Fits: IAG Competition, Street & Race Air Oil Separators

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Bestseller No. 5

IAG Performance AOS Strut Tower Mounting Bracket fits Subaru 2008-20 WRX/STI, 2005-09 Legacy GT

• The IAG Performance AOS (Air Oil Separator) Strut Tower mounting bracket was originally designed to replace the standard mounting bracket included with early version 1 IAG's AOS kits.
• The redesigned bracket enabled installers to manipulate the AOS on the passenger side strut tower into a position to clear most rotated turbo kits, large TMIC's and FMIC's that fits Subaru 2008-14 WRX, 2008-14 STI's and 2005-09 Legacy GT / Spec B.
• The bracket, made from 3/16" aluminum, powder coated black, with mounting holes is supplied standard with the IAG Performance AOS's.
• Please note: Some report this item does not work with the following: 2008-14 WRX / STI ETS rotated turbo kits, 2008-14 WRX Spearco TMIC *Requires special bracket
• Included: (1) Powder Coated Black Aluminum Mounting Bracket, (2) 6mm x 12mm Socket Head Cap Screws Fits: IAG Competition, Street & Race Air Oil Separators

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Bestseller No. 6

IAG Performance Air/Oil Separator (AOS) Competition to Street Series Conversion Kit fits Subaru WRX 2015-21

• The IAG AOS conversion kit is designed to switch the upper breather portion of the V3 Competition Series AOS to the V3 Street Series AOS that fits Subaru WRX 2015-21.
• The kit includes the new billet aluminum V3 Street Series double breather, Street Series vent hose assembly, 3/8" hose with PCV valve, 90-degree fitting, and associated hardware.
• Fitment: This kit is used to convert vehicles with obsolete part# IAG-ENG-7282 to part# IAG-ENG-7182. WILL NOT FIT the V2 AOS with part# IAG-ENG-7252.
• Includes: (x1) IAG V3 Street Series Air Oil Separator Upper Breather Port, (x1) Upper Breather Port O-Ring, (x2) M4 x 25mm socket head screw, (x1) Street Series Vent Hose Assembly (5/8 inch hose to Y fitting to (x2) 1/2 inch hoses), (x1) 3/8 inch hose with integrated PCV valve (21 inch), (x8) 8 inch zip ties, (x1) 3/8 inch 90 degree barb fitting

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Bestseller No. 7

IAG Performance AOS Strut Tower Mounting Bracket fits Rotated Turbo Kits Fits Subaru 2006-07 WRX, 2004-07 STi, 2004-08 Forester XT

• The IAG Performance Air Oil Separator Strut Tower mounting bracket is designed to replace the standard mounting bracket included with IAG's AOS kits produced before mid April 2016. The bracket is made from 3/16" aluminum that is powder coated black and features all the mounting holes required to manipulate the AOS on the passenger side strut tower into a position to clear most rotated turbo kits, large TMIC's and FMIC's.
• The IAG AOS Strut Tower Bracket for Rotated Turbo Kits is designed and fits Subaru 06-07 Impreza WRX and 2004-07 STI as well as 2004-08 Forester XT.
• Note this bracket is now the standard bracket included in AOS kits with part# IAG-ENG-7250 & IAG-ENG-7150.
• Included: (1) Powder Coated Black Aluminum Mounting Bracket, (1) 8mm x 16mm Socket Head Cap Screw, (1) 6mm x 12mm Socket Head Cap Screw
• Fits: IAG Competition, Street & Race Air Oil Separators

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Bestseller No. 8

IAG Performance AOS Pitch Mount Bracket fits Subaru 2008-14 WRX / STI, 2005-09 Legacy GT

• The IAG Performance AOS (Air Oil Separator) pitch mount bracket is designed to replace the standard mounting bracket included with IAG's AOS kits.
• The 3 piece billet aluminum bracket is CNC machined in our Westminster facility and features all the mounting holes required to relocate the AOS from the passenger side strut tower to the center firewall above the transmission pitch mount. Repositioning the AOS to this location may be necessary for clearance with some front mount intercoolers and rotated turbo kits.
• The IAG AOS pitch mount bracket fits Subaru 2008-14 Impreza WRX and STI as well as 2005-09 Legacy GT and Spec B.
• Includes: (x1) 3 Piece Billet Aluminum Mounting Bracket, (x3) 6mm x 12mm Socket Head Cap Screws, (x1) 10mm x 70mm Flange Head Bolt, (x1) 10mm Serrated Flange Nut
• Fits: IAG Competition, Street & Race Air Oil Separators

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Bestseller No. 9

IAG Performance Replacement EJ .75" x 2" Block Drain Hose for V2 / V3 AOS

• The IAG Performance replacement .75" x 2" block drain hose is designed to fit all EJ version 2 and version 3 IAG Air Oil Separators.
• Direct replacement hose for IAG V2 & V3 AOS part numbers: IAG-ENG-7150, IAG-ENG-7151, IAG-ENG-7250, IAG-ENG-7251, IAG-ENG-7180, IAG-ENG-7181, IAG-ENG-7280, IAG-ENG-7281

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Bestseller No. 10

IAG Air/Oil Separator (AOS) Competition to Street Series Conversion Kit for Subaru WRX 06-14, STi 04-21

• The IAG AOS conversion kit is designed to switch the upper breather portion of the V3 Competition Series AOS to the V3 Street Series AOS on the 2006-14 WRX and 2004-21 STI.
• The kit includes the new billet aluminum Street Series double breather, 1/2" hose, 3/8" hose with integrated PCV valve and hose clamp, 90-degree fittings, straight unions and associated hardware.
• Fitment: This kit converts vehicles with part# IAG-ENG-7281 to IAG-ENG-7181, This kit converts vehicles with part# IAG-ENG-7280 to IAG-ENG-7180, WILL NOT FIT V2 AOS with part# IAG-ENG-7251 and IAG-ENG-7250
• Includes: (x1) IAG V3 Street Series Air Oil Separator Upper Breather Port, (x1) Upper Breather Port O-Ring, (x2) M4 x 25mm socket head screw, (x1) 1/2 inch hose (39 inch length), (x1) 3/8 inch hose (27 inch length) with PCV valve and breather fitting, (x1) 1/2 inch straight barb union fitting, (x2) 90 degree 1/2 inch fitting, (x10) 8 inch zip ties, (x1) 11 inch zip tie, (x1) 5/8 inch vinyl cap, (x1) 5/8 inch to 1/2 inch straight barb union with 2 inch of 5/8 inch hose

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How Do We Test Iag Performance Aos 

If you’re looking for an unbiased opinion on any product, we’ve got your back. Our reviews are rigorous and thorough – taking all factors into account including design, features, price-to something else that matters most in making an informed decision before purchasing one of these items!

Factors to Consider Before Purchasing Iag Performance Aos

What’s the point of a buying guide if you don’t know what factors to consider before purchasing products?

• Satisfy your need
• Features & Specifications
• Quality & Durability
• Brand Value
• Customer Reviews & Ratings
• Price
• Customer Service

You may be wondering why you need to consider some factors about a product before purchasing. It’s because there are so many things that can go into making your decision, and knowing all of them upfront will help keep any surprises later on in life!

What’s The Best Place To Purchase Iag Performance Aos

Online shopping is the way of 2026, and if you want to make sure that your purchase will be an excellent one then there’s no better place than online. You’ll have access to so many more products in different shapes sizes colors flavors brands with unbeatable prices.

There are so many different options when it comes to choosing a new product, and we truly believe that you should do your research before making such an important purchase. The questions might include:

• Should I buy a new, used or refurbished iag performance aos?
• Do you really need the high quality iag performance aos there is?
• What are must-have features for iag performance aos?
• Best time to buy a iag performance aos?
• What are the benefits of buying iag performance aos?
• Why is it critical to invest in a good, particularly the best one, in today’s market?

In our opinion, investing in a good, high-quality product will make you feel confident about your purchase. You can tell that the company put effort into making sure it was top-notch and took their time with designing everything from packaging to graphics for marketing purposes because this makes them seem more reliable than competitors who don’t invest so much money on these things (especially if they’re cheap). Plus having quality materials ensures longevity which is always nice. 

Tips For Being A Smart Online Shopper

When shopping for a product online, be sure to read the reviews before making a purchase. This can give you a good idea of what to expect from the product and can help you decide if it’s the right fit for your needs. Additionally, be sure to check the return policy and shipping times before buying anything. This way, if you’re not happy with the product, you can easily return it without any hassle. And if you need the product quickly, you’ll know that it will arrive in a timely manner.

When looking for a product, be sure to compare prices from different retailers. This way, you can be sure you’re getting the best deal possible. Additionally, be sure to read the fine print before making any purchase, as some retailers may have hidden fees or charges. By taking the time to do your research, you can be sure you’re getting the best possible deal on the product you want.

These are just a few things to keep in mind when shopping for a product. By taking the time to consider your needs and doing your research, you can be sure you’re getting the best possible product for your needs. And if you have any questions, be sure to contact customer service or the retailer before making your purchase.

FAQs About Best Iag Performance Aos

What is More Important: a Good Product Or a Good After-sales Service?

When it comes to choosing a product, many people prioritize the quality of the product itself. However, after-sales service can be just as important, especially if something goes wrong with the product. So when it comes to choosing a product, it’s important to weigh both factors and decide which is more important to you. If quality is your main concern, be sure to choose a product that comes from a reputable brand and has good reviews. However, if you’re more concerned with after-sales service, be sure to choose a product from a company that offers excellent customer service. 

How to Save Money When Buying Online? 

When shopping for a iag performance aos online, there are a few things you can do to save money. First, be sure to compare prices from different retailers before making a purchase. This way, you can be sure you’re getting the best deal possible. Additionally, be sure to read the fine print before making any purchase, as some retailers may have hidden fees or charges. By taking the time to do your research, you can be sure you’re getting the best possible deal on the product you want.

Conclusion

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We’re here for you. We’ll help answer any questions or concerns about the product as long as they don’t involve technical details like how it works in a general sense! If there’s anything else on your mind, please let us know because someone will be happy to assist immediately-we want this process easy and breezy.

As a prospective buyer, it’s important that you research the product thoroughly before purchasing. There are many online forums where people can share their knowledge and experiences with different products in order to help guide your decision on what is best for yourself.

With our guide, you can find the best iag performance aos available on Amazon. We make use of Big Data and AI data to compile this list so it is highly accurate.

The process of creating this content was challenging, but our team persevered through it to bring you the best possible results. We read user reviews and looked at what buyers think about each product so that your buying experience will be satisfying.