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2015-2021 WRX STI Mods

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Perrin Neon Yellow Rear Shock Tower Brace 2015-2021 WRX/STI

$235.00
$235.00 - $235.00
$235.00
$176.25
$176.25 - $176.25
$176.25

Enhance chassis rigidity and improve steering precision with the ultra-strong PERRIN Rear Shock Tower Brace.  PERFORMANCE During cornering, the Pe...

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Perrin Red Rear Shock Tower Brace 2015-2021 WRX/STI

$223.00
$223.00 - $223.00
$223.00
$167.25
$167.25 - $167.25
$167.25

Enhance chassis rigidity and improve steering precision with the ultra-strong PERRIN Rear Shock Tower Brace.  PERFORMANCE During cornering, the Pe...

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Perrin Red Oil Cap 2002+ WRX / 2004-2021 STI

$82.00
$82.00 - $82.00
$82.00
$61.50
$61.50 - $61.50
$61.50

Replace the ugly yellow plastic OEM oil fill cap with the sexy billet aluminum PERRIN Oil Fill Cap! Complete Your Engine Bay The Perrin Aluminum O...

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Perrin Black Oil Cap 2002+ WRX / 2004-2021 STI

$82.00
$82.00 - $82.00
$82.00
$61.50
$61.50 - $61.50
$61.50

Replace the ugly yellow plastic OEM oil fill cap with the sexy billet aluminum PERRIN Oil Fill Cap! Complete Your Engine Bay The Perrin Aluminum O...

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Perrin Neon Yellow Oil Cap 2002+ WRX / 2004-2021 STI

$88.00
$88.00 - $88.00
$88.00
$66.00
$66.00 - $66.00
$66.00

Replace the ugly yellow plastic OEM oil fill cap with the sexy billet aluminum PERRIN Oil Fill Cap! Complete Your Engine Bay The Perrin Aluminum O...

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Perrin Blue Oil Cap 2002+ WRX / 2004-2021 STI

$82.00
$82.00 - $82.00
$82.00
$61.50
$61.50 - $61.50
$61.50

Replace the ugly yellow plastic OEM oil fill cap with the sexy billet aluminum PERRIN Oil Fill Cap! Complete Your Engine Bay The Perrin Aluminum O...

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Perrin Hyper Pink Oil Cap 2002+ WRX / 2004-2021 STI

$88.00
$88.00 - $88.00
$88.00
$66.00
$66.00 - $66.00
$66.00

Replace the ugly yellow plastic OEM oil fill cap with the sexy billet aluminum PERRIN Oil Fill Cap! Complete Your Engine Bay The Perrin Aluminum O...

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Perrin Neon Yellow Fender Shrouds 2015-2021 WRX/STI

$160.00
$160.00 - $160.00
$160.00
$120.00
$120.00 - $120.00
$120.00

COMPLETE THE LOOK Matching Perrin's signature pulley cover design, the angled cutouts look great while concealing the factory fender gap.  DESIGN P...

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Perrin Red Fender Shrouds 2015-2021 WRX/STI

$124.00
$124.00 - $124.00
$124.00
$93.00
$93.00 - $93.00
$93.00

COMPLETE THE LOOK Matching Perrin's signature pulley cover design, the angled cutouts look great while concealing the factory fender gap.  DESIGN P...

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Perrin Black Fender Shrouds 2015-2021 WRX/STI

$124.00
$124.00 - $124.00
$124.00
$93.00
$93.00 - $93.00
$93.00

COMPLETE THE LOOK Matching Perrin's signature pulley cover design, the angled cutouts look great while concealing the factory fender gap.  DESIGN P...

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Perrin Hyper Pink Fender Shrouds 2015-2021 WRX/STI

$160.00
$160.00 - $160.00
$160.00
$120.00
$120.00 - $120.00
$120.00

COMPLETE THE LOOK Matching Perrin's signature pulley cover design, the angled cutouts look great while concealing the factory fender gap.  DESIGN P...

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Perrin 5x114.3 7mm Wheel Spacers

$176.00
$176.00 - $176.00
$176.00
$132.00
$132.00 - $132.00
$132.00

PERRIN Wheel Spacers move your wheels and tires outwards so they are more flush with the fender--instantly give your vehicle the perfect stance. Fo...

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Perrin Carbon Fiber Strut Tower Brace 2015-2021 WRX/STI

$485.00
$485.00 - $485.00
$485.00
$363.75
$363.75 - $363.75
$363.75

Performance During cornering, the Perrin Strut Tower Brace improves chassis rigidity, enhances steering precision under high load conditions, and r...

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Perrin Pitch Stop Mount 2002+ WRX / 2004+ STI

$117.00
$117.00 - $117.00
$117.00
$87.75
$87.75 - $87.75
$87.75

DESCRIPTION Under hard acceleration, the drivetrain is being twisted front-to-back from the front axle torque twist. To control this front-to-back ...

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Perrin Top Mount Intercooler Kit 2008-2021 STI

$890.00
$890.00 - $890.00
$890.00
$667.50
$667.50 - $667.50
$667.50

DESCRIPTION The Perrin TMIC is 12% larger than the nearest competitor's core. The large core means less restriction and better cooling capabilities...

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Perrin Red Battery Tie Down 2002+ WRX / 2004-2021 STI

$82.00
$82.00 - $82.00
$82.00
$61.50
$61.50 - $61.50
$61.50

DESCRIPTION The Perrin Battery Tie Down is a quick and affordable upgrade for your Subaru. Batteries are essential for many of your vehicles functi...

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Perrin Black Battery Tie Down 2002+ WRX / 2004-2021 STI

$82.00
$82.00 - $82.00
$82.00
$61.50
$61.50 - $61.50
$61.50

DESCRIPTION The Perrin Battery Tie Down is a quick and affordable upgrade for your Subaru. Batteries are essential for many of your vehicles functi...

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Perrin Neon Yellow Battery Tie Down 2002+ WRX / 2004-2021 STI

$88.00
$88.00 - $88.00
$88.00
$66.00
$66.00 - $66.00
$66.00

DESCRIPTION The Perrin Battery Tie Down is a quick and affordable upgrade for your Subaru. Batteries are essential for many of your vehicles functi...

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Perrin Blue Battery Tie Down 2002+ WRX / 2004-2021 STI

$82.00
$82.00 - $82.00
$82.00
$61.50
$61.50 - $61.50
$61.50

DESCRIPTION The Perrin Battery Tie Down is a quick and affordable upgrade for your Subaru. Batteries are essential for many of your vehicles functi...

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Perrin Pink Battery Tie Down 2002+ WRX / 2004-2021 STI

$88.00
$88.00 - $88.00
$88.00
$66.00
$66.00 - $66.00
$66.00

DESCRIPTION The Perrin Battery Tie Down is a quick and affordable upgrade for your Subaru. Batteries are essential for many of your vehicles functi...

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Perrin Transmission Crossmember Bushing Kit 2008+ WRX / 2008-2021 STI

$58.00
$58.00 - $58.00
$58.00
$43.50
$43.50 - $43.50
$43.50

DESCRIPTION Dial in your drivetrain feel and eliminate excess play with the Perrin Transmission Crossmember Bushing Kit for the 2008+ WRX and 2008–...

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Perrin 5x114.3 30mm Wheel Spacers 2015+ WRX / 2005-2021 STI

$254.01
$254.01 - $254.01
$254.01
$190.51
$190.51 - $190.51
$190.51

DESCRIPTION The PERRIN 30mm Wheel Spacers for 2015+ WRX and 2005–2021 STI with a 5x114.3 bolt pattern are the ultimate solution for aggressive whee...

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Perrin 26mm Front Sway Bar 2015-2021 STI

$300.00
$300.00 - $300.00
$300.00
$225.00
$225.00 - $225.00
$225.00

Upgrade your WRX or STI with a PERRIN Adjustable Front Swaybar for improved handling and performance. This easy suspension upgrade enhances corneri...

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Perrin 26mm Front Sway Bar 2015-2021 WRX

$317.00
$317.00 - $317.00
$317.00
$237.75
$237.75 - $237.75
$237.75

Upgrade your WRX or STI with a PERRIN Adjustable Front Swaybar for improved handling and performance. This easy suspension upgrade enhances corneri...

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

$486.20 - $486.20
$486.20
$486.20 - $486.20
$486.20

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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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!