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IAG Performance AOS Conversion Kit Air / Oil Separator (AOS) Street to Competition Series Conversion Kit

Engine Oil Separator Hose


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

  • Converts Street Series AOS to Comp Series AOS
Pricing: $89.99



Subaru: WRX STI 15 - 21, Subaru: Impreza 04 - 14 WRX STI / WRX

  • 1068.101(b)(2).
  • 1068.101(b)(I) and "Defeat Devices" in CAA§
  • 203(a)(3)(A), 42 U.S.C. §
  • 203(a)(3)(B), 42 U.S.C. §
  • 7522(a)(3)(A), 40 C.F. R. §
  • 7522(a)(3)(B), 40 C.F.R. §
  • Competition Series AOS are "Competition Only" components for installation exclusively on "Competition" vehicles or "Racing" vehicles not subject to pollution control. IAG recommends the Competition Series AOS for Competition vehicles with greater than 600 WHP output. The Competition Series AOS prevents any oil suspended in the PCV gases from re-entering the turbo inlet but requires calibration or tune changes. Select a Street Series AOS if you prefer not to retune your Competition vehicle for this upgrade. For Competition vehicles, follow your engine builder's maintenance directions, but perform oil changes before every race or practice event . IAG is not offering any Competition only components for installation on street driven or regulated applications. Installing a Competition Series AOS on a vehicle other than a Competition vehicle used solely for competition motorsport may be violation of the federal prohibitions against "Tampering" provided in CAA§
  • Kit Includes: (x1) IAG Competition Series Breather Port, (x1) Breather port o-ring, (x1) 1" I.D. Breather discharge hose 60 inch length, (x1) 1/4 inch NPT plug, (x1) 1/2 inch rubber cap, (x1) 5/8 inch rubber cap, (x1) 11 inch zip tie, (x5) 6 inch zip tie.
  • May require tune recalibration.
  • This kit is designed to convert part# IAG-ENG-71XX to part# IAG-ENG-72XX.

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 2004-21 STI. The kit includes the new billet aluminum Competition Series Single breather port, replacement breather o-ring, breather discharge hose, NPT plug, (x2) rubber caps and zip ties.


  • IAG-ENG-7210
  • IAG-ENG-7210
  • 887753779922
  • IAG Performance
  • New


Shipping Information

  • Item Requires Shipping
  • 3.3 lbs.
  • W3.3000” x H4.0000” x L12.0000”

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