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2015-2021 WRX & STI Mods

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

$499.99
$499.99 - $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 Street Series Black Air Oil Separator 2015-2021 WRX

$499.99
$499.99 - $499.99
$499.99
$499.99 - $499.99

PROTECT YOUR ENGINE The IAG Air / Oil Separator (AOS) is a smart investment to safeguard and improve your Subaru's performance. Developed ...

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IAG Street Series Red Air Oil Separator 2015-2021 WRX

$499.99
$499.99 - $499.99
$499.99
$499.99 - $499.99

PROTECT YOUR ENGINE The IAG Air / Oil Separator (AOS) is a smart investment to safeguard and improve your Subaru's performance. Developed ...

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

$499.99
$499.99 - $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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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

$325.00
$325.00 - $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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COBB Tuning Air Oil Separator 2015-2021 WRX

$610.00
$610.00 - $610.00
$610.00
$610.00 - $610.00

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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Perrin Red Air Oil Separator 2015-2021 WRX

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

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

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

$325.00
$325.00 - $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

$499.99
$499.99 - $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...

View full details

IAG Street Series Neon Yellow Air Oil Separator 2015-2021 WRX

$499.99
$499.99 - $499.99
$499.99
$499.99 - $499.99

PROTECT YOUR ENGINE The IAG Air / Oil Separator (AOS) is a smart investment to safeguard and improve your Subaru's performance. Developed ...

View full details
Save 15% Save %

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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Save 15% Save %

Perrin Neon Yellow Air Oil Separator 2015-2021 WRX

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

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

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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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If you own a Subaru WRX STI, you know you have the perfect platform to craft a masterpiece on wheels. At WRXDaily, we understand that every enthusiast has a vision, and we’re here to offer the WRX STI mods you need to bring yours to life. With products tailored to elevate performance, enhance style, and perfect handling, our curated selection puts endless possibilities at your fingertips. 

No matter what you need, our Subaru WRX STI modifications deliver quality and reliability you can trust. From high-performance upgrades to must-have Subaru STI accessories, we have everything you need to create a car that’s as bold and unique as your passion for driving. Own a 2018 WRX? We offer a variety of 2018 WRX parts designed to fit your specific model. 

With WRXDaily, your Subaru becomes a true reflection of your style and ambition. Browse our selection of WRX STI mods today and start your next build!