Air Oil Separators

IAG V3 Competition Series AOS Competition Series AOS are “Competition Only” components for installation exclusively on “Competition” vehicles or “Racing” vehicles not subject to pollution control. IAG recommends the...

IAG V3 Street Series AOS The IAG Performance V3 Street Series Air / Oil separator (AOS) is an excellent investment to keep your Subaru vehicle running well. The Street Series AOS maintains OEM PCV system functionality, but supplements its capacity. The...

IAG V3 Competition Series AOS Competition Series AOS are “Competition Only” components for installation exclusively on “Competition” vehicles or “Racing” vehicles not subject to pollution control. IAG recommends the...

IAG V3 Street Series AOS The IAG Performance V3 Street Series Air / Oil separator (AOS) is an excellent investment to keep your Subaru vehicle running well. The Street Series AOS maintains OEM PCV system functionality, but supplements its capacity. The...

IAG V3 Competition Series AOS Competition Series AOS are “Competition Only” components for installation exclusively on “Competition” vehicles or “Racing” vehicles not subject to pollution control. IAG recommends the...

IAG V3 Street Series AOS The IAG Performance V3 Street Series Air / Oil separator (AOS) is an excellent investment to keep your Subaru vehicle running well. The Street Series AOS maintains OEM PCV system functionality, but supplements its capacity. The...

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...

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...

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...

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...

The IAG AOS conversion kit is designed to switch the upper breather portion of the Competition Series AOS to the Street Series AOS on the 2006-14 Subaru WRX and 2004-20 STI. The kit includes the new billet aluminum Street Series double breather, 1/2"...

The IAG AOS conversion kit is designed to switch the upper breather portion of the Competition Series AOS to the Street Series AOS on the 2015-20 Subaru WRX. The kit includes the new billet aluminum Street Series double breather, Street Series vent hose...

The IAG AOS conversion kit is designed to switch the upper breather portion of the Street Series AOS to the Competition Series AOS in the 2006-14 Subaru WRX and 2004-20 STI. The kit includes the new billet aluminum Competition Series Single breather...

The IAG AOS conversion kit for the 2015-16 Subaru WRX FA20 DIT engine is designed to switch the upper breather portion of the Street Series AOS to the Competition Series AOS. The kit includes the new billet aluminum Competition Series Single breather...

As part of IAG's ongoing Subaru EJ Series engine performance program, we have developed a stainless steel AN breather fitting set with a focus on performance and serviceability. Our Stainless Steel AN Breather Kit allows you to use lightweight racing...

The IAG AOS replacement o-ring seals and hardware set is designed for those rebuilding an IAG Air Oil Separator. Included in the set are the main hardware and seals to rebuild the body/can of either the Street or Competition Series AOS.Includes: (2)...

This is a direct replacement IAG Street Series AOS PCV Line Kit that is included with all Street Series air oil separators after October 1, 2016. The kit includes the two-part line, valve, and fitting.

The IAG Performance replacement 3/8" NPT to 5/8" aluminum barb hose fitting is designed to fit the 2015-20 Subaru WRX with IAG Street Series or Competition Series air oil separator. The fitting ties the AOS to the PCV system. Direct replacement Y...

The IAG Performance replacement plastic Y Connector fitting is designed to fit the 2006-14 Subaru WRX and 2004-20 STI with IAG Street Series or Competition Series air oil separator. The Y fitting ties the AOS to PCV system. Direct replacement Y Connector...

Replacement coolant line hose with crimped aluminum fitting in a 24" length designed specifically to work with the IAG V2 air oil separators. Please know your required hose length before ordering a few AOS applications require a longer length. This item...

Replacement coolant line hose with crimped aluminum fitting in a 43" length designed specifically to work with the IAG V2 air oil separators. Please know your required hose length before ordering. This item will not work with the V3 AOS.

The IAG V2 Competition Series Air Oil Separator Replacement Hose Line & Hardware Install kit includes all the hoses, lines and hardware that wass included in an IAG V2 Competition Series AOS for the 2006-07 Subaru WRX and 2004-07 STI (PN#...

The IAG V2 Competition Series Air Oil Separator Replacement Hose Line & Hardware Install kit includes all the hoses, lines, and hardware that was included in an IAG V2 Competition Series AOS for the 2008-14 Subaru WRX, 2008-18 STI and 2005-09 Legacy...

The IAG V2 Competition Series Air Oil Separator Replacement Hose Line & Hardware Install kit includes all the hoses, lines and hardware that was included in an IAG V2 Competition Series AOS for the 2015-20 Subaru WRX (PN# IAG-ENG-7252). *Please note...

The IAG V2 Street Series Air Oil Separator Replacement Hose Line & Hardware kit includes all the hoses, lines and hardware that was included in an IAG V2 Street Series AOS for the 2006-07 Subaru WRX and 2004-07 STI (PN# IAG-ENG-7150). *Please note...

The IAG Street Series V2 Air Oil Separator Replacement Hose Line & Hardware Install kit includes all the hoses, lines, and hardware that was included in an IAG Street Series V2 AOS for the 2008-14 Subaru WRX, 2008-20 STI and 2005-09 Legacy GT (PN#...

The IAG V2 Street Series Air Oil Separator Replacement Hose Line & Hardware Install kit includes all the hoses, lines and hardware that was included in an IAG V2 Street Series AOS for the 2015-20 Subaru WRX (PN# IAG-ENG-7152). *Please note this does...

IAG Street Series and Competition Series air oil separator replacement ECU relocation bracket for the 2015-17 Subaru WRX (PN# IAG-ENG-7152, IAG-ENG-7252 ).

The IAG wiring harness relocation bracket is included in an IAG Street Series and Competition Series AOS for the 2008-14 Subaru WRX, 2008-20 STI and 2005-09 Legacy GT (PN# IAG-ENG-7151 and PN# IAG-ENG-7251).