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2015-2021 WRX & STI Mods

COBB Tuning SS 2" Uppipe 2006-2014 WRX / 2004-2021 STI

$275.00
$275.00 - $275.00
Current price $275.00
Original price $275.00 - Original price $275.00
Original price

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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Invidia Catted Downpipe w/ 2 Bungs 2015-2021 WRX CVT

Current price $1,247.54
$1,247.54 - $1,247.54
Current price $1,247.54
Original price $1,782.80
Original price $1,782.80 - Original price $1,782.80
Original price $1,782.80

DESCRIPTION The Invidia Catted Downpipe with 2 Bungs is precision-engineered to elevate the performance of your 2015-2021 Subaru WRX (CVT). By repl...

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GrimmSpeed Equal Length Headers 2015-2021 WRX

$974.00
$974.00 - $974.00
Current price $974.00
Original price $974.00 - Original price $974.00
Original price

DESCRIPTION The GrimmSpeed Equal Length Header has been designed to provide the turbocharger with an uninterrupted flow of exhaust gases to greatly...

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Invidia Equal Length Big Tube Headers & Up-Pipe 2002-2014 WRX / 2006-2021 STI

Current price $1,852.69
$1,852.69 - $1,852.69
Current price $1,852.69
Original price $2,786.00
Original price $2,786.00 - Original price $2,786.00
Original price $2,786.00

DESCRIPTION The Invidia Equal Length Big Piping Exhaust Manifold is the ultimate upgrade for Subaru models, including the 2002-2014 WRX and 2004-20...

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AWE Touring Edition Catback Exhaust w/ Chrome Silver Tips 2015-2021 WRX

Current price $1,595.00
$1,595.00 - $1,595.00
Current price $1,595.00
Original price $1,626.32
Original price $1,626.32 - Original price $1,626.32
Original price $1,626.32

BOXER® uncorked: Soundtrack engineered for the EJ25, this is not just a repurposed VA WRX exhaust Proudly engineered, designed, and manufactured i...

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Tomei Expreme Ti Titanium Dual Exit Catback 2011-2021 WRX / 2011-2021 STI

Current price $1,701.00
$1,701.00 - $1,701.00
Current price $1,701.00
Original price $1,890.00
Original price $1,890.00 - Original price $1,890.00
Original price $1,890.00

For those of you looking to add performance by losing weight and adding horsepower, then you will be pleased with the Tomei Expreme Titanium Cat-Ba...

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Invidia Q300 Titanium Tip Catback Exhaust 2015-2021 WRX / 2015-2021 STI

Current price $1,755.87
$1,755.87 - $1,755.87
Current price $1,755.87
Original price $2,640.40
Original price $2,640.40 - Original price $2,640.40
Original price $2,640.40

DESCRIPTION The Invidia Q300 Quad Tip Cat-Back Exhaust System with Titanium Burnt Tips is the perfect performance upgrade for 2015-2021 Subaru WRX/...

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Invidia Gemini R400 Black Tip Catback Exhaust 2015-2021 WRX / 2015-2021 STI

Current price $1,778.21
$1,778.21 - $1,778.21
Current price $1,778.21
Original price $2,674.00
Original price $2,674.00 - Original price $2,674.00
Original price $2,674.00

DESCRIPTION The Invidia Gemini R400 Single-Layer Cat-Back Exhaust System with Black Tips is engineered for performance enthusiasts seeking improved...

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PLM Equal Length Headers 2015-2021 STI

$660.00
$660.00 - $660.00
Current price $660.00
Original price $660.00 - Original price $660.00
Original price

PLM Subaru WRX & STi EJ EJ25 Equal Length Header Newly released - Oct. 2021! Guarantee the best value and will be the best selling EJ-series he...

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ETS MaxFlow V2 Header 2004-2021 STI

$1,495.00
$1,495.00 - $1,495.00
Current price $1,495.00
Original price $1,495.00 - Original price $1,495.00
Original price

The wait is over! Extreme Turbo Systems is proud to release our new Subaru STI V2 MaxFlow Exhaust Header for the 2004+ Subaru STI. We designed our ...

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GrimmSpeed Downpipe to Catback 3" Gasket 2x Thick 2002-2026 WRX / 2004-2021 STI

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

DESCRIPTION Tired of the endless searching for a 3" 2 Bolt premium gasket that doesn't blow out? Most aftermarket Subaru exhaust systems need a 3" ...

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GrimmSpeed Aftermarket 3" Downpipe to OEM Catback Adapter

$63.00
$63.00 - $63.00
Current price $63.00
Original price $63.00 - Original price $63.00
Original price

DESCRIPTION Exhaust leaks seem to be an all-too-common issue with most modded Subarus. The most guaranteed leak you will get is if you run an after...

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COBB Tuning 2.5" 2-Bolt Exhaust Gasket

$20.00
$20.00 - $20.00
Current price $20.00
Original price $20.00 - Original price $20.00
Original price

EMISSIONS This part is not an emissions-related part and therefore can be used on Emission Controlled Vehicles. DESCRIPTION COBB Exhaust ga...

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ETS Extreme Resonated Catback Burnt Tips 2015-2021 WRX/STI

$1,395.00
$1,395.00 - $1,395.00
Current price $1,395.00
Original price $1,395.00 - Original price $1,395.00
Original price

The ETS Catback exhaust for the 2015-2021 Subaru WRX and STI is a made at ExtremeTurboSystem's facility in Vancouver, Washington. This exhaust feat...

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Invidia N1 Catback Exhaust w/ Bead Blasted Piping Titanium Tip 2015-2021 WRX / 2015-2021 STI

Current price $924.48
$924.48 - $924.48
Current price $924.48
Original price $1,390.20
Original price $1,390.20 - Original price $1,390.20
Original price $1,390.20

DESCRIPTION The Invidia N1 Single Exit Cat-Back Exhaust System with Bead Blasted Piping and Titanium Tip is a top-tier upgrade for 2015-2021 Subaru...

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Invidia N1 Racing Burnt Tip Single Exit Exhaust 2015-2021 WRX / 2015-2021 STI

Current price $924.48
$924.48 - $924.48
Current price $924.48
Original price $1,390.20
Original price $1,390.20 - Original price $1,390.20
Original price $1,390.20

DESCRIPTION The Invidia N1 Racing Series Single Exit Cat-Back Exhaust with Titanium Tip is engineered for 2015-2021 Subaru WRX/STI models to delive...

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Invidia Q300 Stainless Tip Catback Exhaust 2015-2021 WRX / 2015-2021 STI

Current price $1,649.73
$1,649.73 - $1,649.73
Current price $1,649.73
Original price $2,480.80
Original price $2,480.80 - Original price $2,480.80
Original price $2,480.80

DESCRIPTION The Invidia Q300 Quad Tipped Cat-Back Exhaust System with Stainless Steel Tips is a premium performance upgrade for the 2015-2021 Subar...

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Invidia Gemini R400 Polished Tips Catback Exhaust 2015-2021 WRX / 2015-2021 STI

Current price $1,649.73
$1,649.73 - $1,649.73
Current price $1,649.73
Original price $2,480.80
Original price $2,480.80 - Original price $2,480.80
Original price $2,480.80

DESCRIPTION The Invidia Gemini Single Layer Cat-Back Exhaust System with Stainless Steel Tips is a premium performance upgrade for 2015-2021 Subaru...

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PLM Non-Resonated Midpipe 2015-2021 WRX / 2015-2021 STI

$495.00
$495.00 - $495.00
Current price $495.00
Original price $495.00 - Original price $495.00
Original price

PLM Private Label Mfg. Power Driven 3" Non-Resonated Midpipe Kit for Subaru WRX STI 3" 2015-2021 was made for maximizing HP gains, more flow, more ...

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AWE Track Edition Catback Exhaust w/ Diamond Black Tips 2011-2021 WRX / 2011-2021 STI

Current price $1,195.00
$1,195.00 - $1,195.00
Current price $1,195.00
Original price $1,300.00
Original price $1,300.00 - Original price $1,300.00
Original price $1,300.00

DESCRIPTION: Specially designed for the unique acoustic properties of the WRX - this system is not an STI clone Rasp-free aggressive BOXER® tone w...

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GrimmSpeed 12mm Two Position Exhaust Hanger 2008-2021 WRX / STI

$15.00
$15.00 - $15.00
Current price $15.00
Original price $15.00 - Original price $15.00
Original price

DESCRIPTION Aftermarket exhaust systems are often larger in diameter than factory systems. As a result, they have a tighter fit below your car. Wit...

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ETS Extreme Non-Resonated Catback Burnt Tips 2015-2021 WRX/STI

$1,295.00
$1,295.00 - $1,295.00
Current price $1,295.00
Original price $1,295.00 - Original price $1,295.00
Original price

The ETS Catback exhaust for the 2015-2021 Subaru WRX and STI is a made at ExtremeTurboSystem's facility in Vancouver, Washington. This exhaust feat...

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Remark Resonated Midpipe 2015-2021 WRX/STI

$855.00
$855.00 - $855.00
Current price $855.00
Original price $855.00 - Original price $855.00
Original price

This is the Remark Mid Pipe Kit. This mid-pipe has been designed with a larger piping diameter to improve the power, performance, and the turbo res...

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Remark Non Resonated Midpipe 2015-2021 WRX/STI

$755.00
$755.00 - $755.00
Current price $755.00
Original price $755.00 - Original price $755.00
Original price

This is the Remark Mid Pipe Kit. This mid-pipe has been designed with a larger piping diameter to improve the power, performance, and the turbo res...

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Remark 4" Burnt Stainless Single Wall Axleback 2015-2021 WRX/STI

$695.00
$695.00 - $695.00
Current price $695.00
Original price $695.00 - Original price $695.00
Original price

Direct bolt-on easy installation to the factory OEM or Remark mid Y-pipe (Please note : this product will NOT fit aftermarket exhaust system)

Invidia Equal Length Race Header 2002-2014 WRX / 2004-2021 STI

Current price $1,217.43
$1,217.43 - $1,217.43
Current price $1,217.43
Original price $1,830.73
Original price $1,830.73 - Original price $1,830.73
Original price $1,830.73

DESCRIPTION The Invidia Equal Length Race Exhaust Manifold is engineered for Subaru models like the 2005+ STI and 2008-2014 WRX, delivering peak pe...

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AWE Touring Edition Catback Exhaust w/ Chrome Silver Tips 2011-2021 STI

Current price $1,595.00
$1,595.00 - $1,595.00
Current price $1,595.00
Original price $1,626.32
Original price $1,626.32 - Original price $1,626.32
Original price $1,626.32

BOXER® uncorked: Soundtrack engineered for the EJ25, this is not just a repurposed VA WRX exhaust Proudly engineered, designed, and manufactured i...

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PLM Resonated Midpipe 2015-2021 WRX / 2015-2021 STI

$545.00
$545.00 - $545.00
Current price $545.00
Original price $545.00 - Original price $545.00
Original price

The PLM Private Label Mfg. Power Driven 3" Resonated Midpipe Kit for the 2015-2021 Subaru WRX STi is designed to maximize performance with increase...

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MBRP Armor Pro Series Single Exit Catback w/ Polished Tip 2011-2021 WRX / 2011-2021 STI

Current price $714.99
$714.99 - $714.99
Current price $714.99
Original price $883.22
Original price $883.22 - Original price $883.22
Original price $883.22

DESCRIPTION Step into serious performance with the MBRP Armor Pro Series Single Exit Cat-Back Exhaust for the 2011–2021 WRX and STI sedans. Featuri...

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ETS Extreme Non-Resonated Catback Polished Tips 2015-2021 WRX/STI

$1,295.00
$1,295.00 - $1,295.00
Current price $1,295.00
Original price $1,295.00 - Original price $1,295.00
Original price

The ETS Catback exhaust for the 2015-2021 Subaru WRX and STI is a made at ExtremeTurboSystem's facility in Vancouver, Washington. This exhaust feat...

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Remark 3.5" Stealth Edition Axleback 2015-2021 WRX/STI

$795.00
$795.00 - $795.00
Current price $795.00
Original price $795.00 - Original price $795.00
Original price

Here, you are looking at the Remark Axle-Back Exhaust System. These have been designed to save weight by replacing the heavy factory mufflers, all ...

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Remark Boso Edition Stainless Steel Axleback 2015-2021 WRX/STI

$695.00
$695.00 - $695.00
Current price $695.00
Original price $695.00 - Original price $695.00
Original price

They are the outlaws of Japan, and known as the "Violent Speed Gang".The outrageous styling, and designs of their JDM vehicles are very iconic with...

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MBRP Race 3" Carbon Fiber Quad Tip Catback Exhaust 2015-2021 WRX / 2015-2021 STI

Current price $1,049.99
$1,049.99 - $1,049.99
Current price $1,049.99
Original price $1,297.05
Original price $1,297.05 - Original price $1,297.05
Original price $1,297.05

MBRP® Cat-Back Performance Exhaust for Subaru WRX2.0L, Subaru WRX STI 2.5L Models. 3" Cat-Back, Dual Split Rear Exit, T304 Stainless Steel, RACE Ve...

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Invidia N1 Burnt Tip Single Exit Exhaust 2015-2021 WRX / 2015-2021 STI

Current price $1,055.75
$1,055.75 - $1,055.75
Current price $1,055.75
Original price $1,587.60
Original price $1,587.60 - Original price $1,587.60
Original price $1,587.60

DESCRIPTION The Invidia N1 Single Exit Cat-Back Exhaust System with Titanium Tip is a premium performance upgrade for the 2015-2021 Subaru WRX/STI....

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Invidia N1 Burnt Tip Dual Catback Exhaust 2015-2021 WRX / 2015-2021 STI

Current price $1,242.88
$1,242.88 - $1,242.88
Current price $1,242.88
Original price $1,869.00
Original price $1,869.00 - Original price $1,869.00
Original price $1,869.00

DESCRIPTION The Invidia N1 Dual Exit Cat-Back Exhaust System with Titanium Tips is a high-performance upgrade for the 2015-2021 Subaru WRX/STI, des...

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Tomei Expreme Equal Length Exhaust Manifold 2002-2014 WRX/ 2004-2021 STI

Current price $801.00
$801.00 - $801.00
Current price $801.00
Original price $890.00
Original price $890.00 - Original price $890.00
Original price $890.00

This is the Tomei Equal Length Exhaust Manifold and is a great upgrade for those of you looking to optimize the exhaust flow for improved power and...

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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!