Skip to content

2015-2021 WRX & STI Mods

Whiteline Front Brace Strut Tower 2015-2021 WRX / 2015-2021 STI

Current price $171.66
$171.66 - $171.66
Current price $171.66
Original price $228.88
Original price $228.88 - Original price $228.88
Original price $228.88

You can never have too much chassis stiffness. Weight aside, the more the better. Chassis bracing maintains alignment angles and spring rates by gr...

View full details

Radium Catch Can Kit 2015-2021 WRX

Current price $417.95
$417.95 - $417.95
Current price $417.95
Original price $439.95
Original price $439.95 - Original price $439.95
Original price $439.95

DESCRIPTION High-powered modified Subaru engines tend to generate excessive blow-by oil and gasses. In these cases, an ordinary small catch can may...

View full details

OVERTAKE Turbo to Downpipe Gasket 2002-2014 WRX / 2004-2021 STI

$18.00
$18.00 - $18.00
Current price $18.00
Original price $18.00 - Original price $18.00
Original price

Overtake Turbo to Downpipe Gasket | Be Done With Leaks Looking for a Subaru gasket that won't leak? We get it – finding a high-quality gasket for y...

View full details

Torque Solutions Cylinder 4 Coolant Mod 2002-2014 WRX / 2004-2021 STI

$79.99
$79.99 - $79.99
Current price $79.99
Original price $79.99 - Original price $79.99
Original price

DESCRIPTION Torque Solution Cylinder 4 Coolant Mod for Subaru EJ Engines was designed to increase coolant flow to cylinder #4 head area. The additi...

View full details

GrimmSpeed Red Top Mount Intercooler Aluminum Y-Pipe Kit 2002-2007 WRX / 2004-2021 STI

$182.00
$182.00 - $182.00
Current price $182.00
Original price $182.00 - Original price $182.00
Original price

DESCRIPTION The Grimmspeed Top Mount Intercooler Y-Pipe Kit has been designed to work with factory or aftermarket top mount intercoolers. This is a...

View full details

OVERTAKE Battery Tie Down 2002-2026 WRX / 2004-2021 STI

$60.00
$60.00 - $60.00
Current price $60.00
Original price $60.00 - Original price $60.00
Original price

Overtake Billet Aluminum Battery Tie Down | Premium Engine Bay Upgrade Elevate the look of your Subaru engine bay with the Overtake Billet Aluminum...

View full details

Torque Solution Carbon Thermal Downpipe Blanket 2002-2014 WRX / 2004-2021 STI

$188.88
$188.88 - $188.88
Current price $188.88
Original price $188.88 - Original price $188.88
Original price

Torque Solution Thermal Downpipe Blankets are highly effective at protecting components around your downpipe by blocking the heat produced by the h...

View full details

Perrin Black Recirculating Blow Off Valve 2002-2007 WRX / 2004-2021 STI

Current price $208.50
$208.50 - $208.50
Current price $208.50
Original price $278.00
Original price $278.00 - Original price $278.00
Original price $278.00

Adjustable relief pressure and flow control makes fine-tuning on the fly simple and quick with the PERRIN BOV/BPV. HIGH FLOW With large 1.225" inle...

View full details

IBR Cylinder 4 Cooling Mod 2002-2014 WRX / 2004-2021 STI

$84.99
$84.99 - $84.99
Current price $84.99
Original price $84.99 - Original price $84.99
Original price

DESCRIPTION This kit is designed to help increase the cooling to the #4 cylinder on the Subaru EJ series engines. This hose kit connects to an exis...

View full details

Turbosmart Black GenV CompGate40 14psi External Wastegate

Current price $394.19
$394.19 - $394.19
Current price $394.19
Original price $437.99
Original price $437.99 - Original price $437.99
Original price $437.99

The GenV WG40 CompGate40 External Wastegate is a Motorsport-proven, cost-effective external wastegate – The Highest Flowing Wastegate of its kind. ...

View full details

IAG Red Revolve Coolant Reservoir Cap 2002-2026 WRX / 2004-2021 STI

$49.99
$49.99 - $49.99
Current price $49.99
Original price $49.99 - Original price $49.99
Original price

TRANSFORM YOUR ENGINE BAY Get rid of the unattractive OEM yellow cap and upgrade your engine bay with the IAG Revolve Coolant Reservoir Cap. ...

View full details

IAG Red Fender Shrouds 2015-2021 WRX / 2015-2021 STI

$119.99
$119.99 - $119.99
Current price $119.99
Original price $119.99 - Original price $119.99
Original price

THE IAG VA FENDER COVERS Transform your Subaru’s engine bay with the IAG VA Fender Shrouds. Designed specifically for the 2015-2021 WRX and S...

View full details

IAG Comfort Pitch Stop Mount 2002-2026 WRX / 2004-2021 STI

$124.99
$124.99 - $124.99
Current price $124.99
Original price $124.99 - Original price $124.99
Original price

DESIGNED FOR COMFORT Designed to fit 2002-2025 WRX, 2004-2021 STI, 2004-2011 FXT and 2005-2009 LGT Subaru models, the IAG Comfort Series Pitc...

View full details

OVERTAKE Hi-Lift Hood Strut Kit 2015-2026 WRX / 2015-2021 STI

$95.00
$95.00 - $95.00
Current price $95.00
Original price $95.00 - Original price $95.00
Original price

Overtake Hi-Lift Hood Struts for VA WRX/STI & VB WRX – The Ultimate Upgrade! If you're looking for improved access and visibility in your engin...

View full details

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

$499.99
$499.99 - $499.99
Current price $499.99
Original price $499.99 - Original price $499.99
Original price

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

Mishimoto Black Oil Cooler Kit 2015-2021 STI

$570.95 - $624.95
$570.95 - $624.95
Current price $570.95
Original price $628.00 - Original price $687.00
Original price $628.00 - Original price $687.00
Original price $628.00

DESCRIPTION The Mishimoto Oil Cooler Kit for the 2015-2021 Subaru STI is designed to keep your engine cool and reliable, whether on the street or t...

View full details

Mishimoto Blue Silicone Radiator Hose Kit 2015-2021 WRX

Current price $134.95
$134.95 - $134.95
Current price $134.95
Original price $148.00
Original price $148.00 - Original price $148.00
Original price $148.00

DESCRIPTION Ditch the rubber and upgrade to the Mishimoto Silicone Radiator Hose Kit for your 2015 Subaru WRX. This kit includes upper and lower ra...

View full details

Mishimoto Red Silicone Radiator Hose Kit 2015-2021 WRX

Current price $134.95
$134.95 - $134.95
Current price $134.95
Original price $143.00
Original price $143.00 - Original price $143.00
Original price $143.00

DESCRIPTION Ditch the rubber and upgrade to the Mishimoto Silicone Radiator Hose Kit for your 2015 Subaru WRX. This kit includes upper and lower ra...

View full details

GrimmSpeed Red Lightweight Battery Mount Kit 2008-2021 WRX / 2008-2021 STI

$109.00
$109.00 - $109.00
Current price $109.00
Original price $109.00 - Original price $109.00
Original price

DESCRIPTION Lightweight Batteries are an excellent and inexpensive way to remove weight from your Subaru, which has an OEM battery tipping the scal...

View full details

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

$499.99
$499.99 - $499.99
Current price $499.99
Original price $499.99 - Original price $499.99
Original price

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

GrimmSpeed Titanium Alternator Shroud 2002–2014 WRX / 2004–2021 STI

$175.00
$175.00 - $175.00
Current price $175.00
Original price $175.00 - Original price $175.00
Original price

DESCRIPTION Upgrade your EJ engine bay with the GrimmSpeed Titanium Alternator Shroud for the 2002–2014 WRX and 2004–2021 STI. Designed for enthusi...

View full details

GrimmSpeed Titanium Pulley Cover 2015–2021 WRX

$175.00
$175.00 - $175.00
Current price $175.00
Original price $175.00 - Original price $175.00
Original price

DESCRIPTION Upgrade your FA20 engine bay with the GrimmSpeed Titanium Pulley Cover for the 2015–2021 Subaru WRX. Designed for enthusiasts who value...

View full details

Fuel Injector Clinic 650cc Fuel Injectors 2002-2014 WRX / 2007-2021 STI

$378.00
$378.00 - $378.00
Current price $378.00
Original price $378.00 - Original price $378.00
Original price

DESCRIPTION These Fuel Injector Clinic 650cc Top Feed Injectors are built for the 2002-2014 WRX and 2007-2021 STI, offering a dependable increase i...

View full details

Perrin Neon Yellow Coolant Overflow Tank 2002+ WRX / 2004-2021 STI

Current price $166.50
$166.50 - $166.50
Current price $166.50
Original price $222.00
Original price $222.00 - Original price $222.00
Original price $222.00

DESCRIPTION The Perrin Coolant Overflow Tank for the 2002+ Subaru WRX and 2004–2021 STI is a premium upgrade that replaces the factory plastic tank...

View full details

Perrin Red Coolant Overflow Tank 2002+ WRX / 2004-2021 STI

Current price $156.00
$156.00 - $156.00
Current price $156.00
Original price $208.00
Original price $208.00 - Original price $208.00
Original price $208.00

DESCRIPTION The Perrin Coolant Overflow Tank for the 2002+ Subaru WRX and 2004–2021 STI is a premium upgrade that replaces the factory plastic tank...

View full details

Verus Engineering Pitch Stop Mount 2002+ WRX / 2004-2021 STI

$119.95
$119.95 - $119.95
Current price $119.95
Original price $119.95 - Original price $119.95
Original price

DESCRIPTION The Verus Engineering Pitch Stop Mount for the 2002+ Subaru WRX and 2004–2021 STI is designed to reduce engine movement and deliver a m...

View full details

GrimmSpeed Black Front Strut Bar 2015-2021 WRX/STI

$249.00
$249.00 - $249.00
Current price $249.00
Original price $249.00 - Original price $249.00
Original price

DESCRIPTION The GrimmSpeed Front Strut Bar for the 2015-2021 Subaru WRX/STI blends precision engineering with clean aesthetics to deliver serious p...

View full details

FactionFab Timing Belt Guide 2002-2014 WRX / 2004-2021 STI

$45.00
$45.00 - $45.00
Current price $45.00
Original price $45.00 - Original price $45.00
Original price

DESCRIPTION The OEM timing belt guides are thin, flimsy, and only have a small range of adjustment. The Faction Fab Timing Belt Guide is made of st...

View full details

Mishimoto Performance Aluminum Radiator 2008-2014 WRX/ 2008-2021 STI

Current price $349.95
$349.95 - $349.95
Current price $349.95
Original price $385.00
Original price $385.00 - Original price $385.00
Original price $385.00

DESCRIPTION Keep your Subaru WRX/STI running cool and performing at its peak with the Mishimoto Performance Aluminum Radiator. Designed to improve ...

View full details

Mishimoto Black Silicone Radiator Hose Kit 2015-2021 WRX

Current price $134.95
$134.95 - $134.95
Current price $134.95
Original price $148.00
Original price $148.00 - Original price $148.00
Original price $148.00

DESCRIPTION Ditch the rubber and upgrade to the Mishimoto Silicone Radiator Hose Kit for your 2015 Subaru WRX. This kit includes upper and lower ra...

View full details

Mishimoto Aluminum Coolant Overflow Tank 2008-2021 WRX / 2008-2021 STI

Current price $233.95
$233.95 - $233.95
Current price $233.95
Original price $257.00
Original price $257.00 - Original price $257.00
Original price $257.00

DESCRIPTION Transform your engine bay with the Mishimoto Coolant Overflow Tank for 2008-2021 STI/WRX. Stock plastic tanks are not only unsightly bu...

View full details

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

Current price $499.80
$499.80 - $499.80
Current price $499.80
Original price $588.00
Original price $588.00 - Original price $588.00
Original price $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...

View full details

GrimmSpeed Exhaust Manifold to Turbo Gasket 2015-2021 WRX

$32.00
$32.00 - $32.00
Current price $32.00
Original price $32.00 - Original price $32.00
Original price

DESCRIPTION At GrimmSpeed we have worked with endless amounts of aftermarket gaskets, none seem to work as well as the multi-layer steel OEM style ...

View full details

GrimmSpeed Black StealthBox Intake 2015-2021 STI

$369.00
$369.00 - $369.00
Current price $369.00
Original price $369.00 - Original price $369.00
Original price

DESCRIPTION The GrimmSpeed StealthBox Cold Air Intake System is the result of countless invested hours in research and development to provide the p...

View full details

COBB Tuning Driveline Bushing Kit 2008-2021 WRX/STI

$165.00
$165.00 - $165.00
Current price $165.00
Original price $165.00 - Original price $165.00
Original price

DESCRIPTION Driveline mounts/bushings are installed to provide the driver with improved feel/response from the engine, driveline, and steering comp...

View full details

COBB Tuning Previous Sensor Kit to Can Flex Fuel Upgrade + Fuel Pressure Kit 2018-2021 WRX

$840.00
$840.00 - $840.00
Current price $840.00
Original price $840.00 - Original price $840.00
Original price

EMISSIONS This part is legal under the provisions of EPA’s Anti-Tampering Policy. COBB Tuning has established a reasonable basis (testing results...

View full details

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!