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Subaru STI Engine Parts

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IAG Neon Yellow Street Series Air Oil Separator 2008-2014 WRX / 2008-2021 STI

$424.99
$424.99 - $424.99
$424.99
$499.99
$499.99 - $499.99
$499.99

SAFEGUARD YOUR SUBARU The IAG Performance Air / Oil Separator (AOS) is a smart upgrade for your Subaru. Developed through years of meticul...

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IAG Red Street Series Air Oil Separator 2008-2014 WRX / 2008-2021 STI

$424.99
$424.99 - $424.99
$424.99
$499.99
$499.99 - $499.99
$499.99

SAFEGUARD YOUR SUBARU The IAG Performance Air / Oil Separator (AOS) is a smart upgrade for your Subaru. Developed through years of meticul...

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COBB Air Oil Separator 2008-2014 WRX / 2008-2021 STI

$595.00
$595.00 - $595.00
$595.00
$595.00 - $595.00

EMISSIONS 50 State Legal. This part is legal for sale and use on Emissions Controlled Vehicles in all 50 states when used in accordance with the ...

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IBR Air Oil Separator 2002-2007 WRX / 2004-2021 STI

$329.99
$329.99 - $329.99
$329.99
$329.99 - $329.99

This kit is designed to be the best AOS on the market. It is a triple pass system with carefully designed diameters and cross sect...

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GrimmSpeed Red Air Oil Separator 2002-2007 WRX / 2004-2021 STI

$276.25
$276.25 - $276.25
$276.25
$325.00
$325.00 - $325.00
$325.00

DESCRIPTION This is the GrimmSpeed Air Oil Separator. If you're familiar with modifying your vehicle, then you will know the importance of an air/o...

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GrimmSpeed Black Air Oil Separator 2002-2007 WRX / 2004-2021 STI

$276.25
$276.25 - $276.25
$276.25
$325.00
$325.00 - $325.00
$325.00

DESCRIPTION The GrimmSpeed Air/Oil Separator for turbocharged Subaru models has a unique design that allows you to maintain your PCV Valve while se...

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IAG Black Street Series Air Oil Separator 2008-2014 WRX / 2008-2021 STI

$424.99
$424.99 - $424.99
$424.99
$499.99
$499.99 - $499.99
$499.99

SAFEGUARD YOUR SUBARU The IAG Performance Air / Oil Separator (AOS) is a smart upgrade for your Subaru. Developed through years of meticul...

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Perrin Neon Yellow Air Oil Separator 2008-2014 WRX / 2008-2021 STI

$499.80
$499.80 - $499.80
$499.80
$588.00
$588.00 - $588.00
$588.00

DESCRIPTION The Perrin Air Oil Separator is not a catch can. Catch cans capture engine blow-by and stores it in a container, which requires constan...

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Perrin Black Air Oil Separator 2002-2021 WRX / 2004-2021 STI

$396.75
$396.75 - $396.75
$396.75
$529.00
$529.00 - $529.00
$529.00

The PERRIN Air Oil Separator removes oil vapors from crankcase gases before they reach the intake manifold. Its ceramic-coated, CNC-machined design...

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Verus Engineering Air Oil Separator 2015-2021 STI

$429.95
$429.95 - $429.95
$429.95
$429.95 - $429.95

DESCRIPTION Protect your 2015–2021 Subaru STI engine with the Verus Engineering Air Oil Separator, designed to keep oil out of the intake system an...

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Your Subaru STI was built for excitement, but why settle for stock when you can achieve so much more? WRXDaily’s premium Subaru STI engine parts help you unlock the raw potential of your car. Turn your track days or daily drives into unbeatable experiences.

Whether you’re aiming for peak efficiency or high-octane power, our Subaru WRX STI engine upgrades deliver solutions tailored to your goals. For even greater customization, explore our range of Subaru STI aftermarket performance parts crafted to elevate every aspect of your engine’s performance.

Every part we offer is precision-engineered for seamless integration and maximum impact. From reliable endurance to thrilling power gains, these parts are made to perform. Don’t wait to transform your Subaru into the ultimate performance machine; start your build with WRXDaily’s expertly crafted parts today.