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2015-2021 WRX STI Mods

AWE Tuning Track Edition Catback Exhaust 2011-2021 WRX/STI

Original price $1,185.00 - Original price $1,235.00
Original price
$1,185.00 - $1,235.00
$1,185.00 - $1,235.00
Current price $1,185.00

Proudly designed, engineered, and manufactured in-house at AWE, in the USA Max gains of 8 hp and 4 ft-lbs of torque at the wheels Handcrafted fro...

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Tomei Expreme Ti Titanium Catback 2008-2021 WRX / 2011-2021 STI

Original price $1,290.00
Original price $1,290.00 - Original price $1,290.00
Original price $1,290.00
Current price $1,161.00
$1,161.00 - $1,161.00
Current price $1,161.00

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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PLM EWG 38mm Up-Pipe w/ Dump Tube 2002-2014 WRX / 2004-2021 STI

Original price $339.00
Original price $339.00 - Original price $339.00
Original price $339.00
$271.20 - $339.00
$271.20 - $339.00
Current price $271.20

PLM Private Label Mfg. Power Driven Subaru EWG Up-Pipe with Dump Tube 38mm features a unique designed up pipe which gives you the option to install...

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Tomei Expreme Equal Length Exhaust Manifold 2015-2021 WRX

Original price $790.00
Original price $790.00 - Original price $790.00
Original price $790.00
Current price $711.00
$711.00 - $711.00
Current price $711.00

Here, you are looking at the Tomei Expreme Equal Length Exhaust Manifold Kit for the 15+ Subaru WRX. This exhaust manifold is the result of 4 years...

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ETS MaxFlow V2 Header 2004-2021 STI

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

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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Invidia Gemini Full Titanium Quad Tip Catback 2015-2021 WRX/STI

Original price $3,983.00
Original price $3,983.00 - Original price $3,983.00
Original price $3,983.00
Current price $2,588.95
$2,588.95 - $2,588.95
Current price $2,588.95

DESCRIPTION The Invidia Gemini R400 Full Titanium Cat-Back Exhaust System is the ultimate performance upgrade for 2015-2021 Subaru WRX and STI mode...

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HKS Super Turbo Muffler Titanium Exhaust 2015-2021 WRX/STI

Original price $5,670.00
Original price $5,670.00 - Original price $5,670.00
Original price $5,670.00
Current price $4,819.50
$4,819.50 - $4,819.50
Current price $4,819.50

PURSUIT OF THE IDEAL EXHAUST SYSTEM With the HKS Super Turbo Muffler Exhaust being made of titanium allows a significent weight reduction to 13.4...

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AWE Tuning Touring to Track Conversion Kit 2015-2021 WRX/STI

Original price $440.00 - Original price $440.00
Original price
$440.00
$440.00 - $440.00
Current price $440.00

BOXER® uncorked: Proudly engineered, designed, and manufactured in-house at AWE, in the USA Rasp-free, aggressive BOXER® tone without the drone ...

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AWE Tuning Track to Touring Conversion Kit 2015-2021 WRX/STI

Original price $720.00 - Original price $720.00
Original price
$720.00
$720.00 - $720.00
Current price $720.00

BOXER® uncorked: Proudly engineered, designed, and manufactured in-house at AWE, in the USA Rasp-free, aggressive BOXER® tone without the drone ...

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Tomei Expreme Unequal Length Exhaust Manifold 2015-2021 WRX

Original price $790.00
Original price $790.00 - Original price $790.00
Original price $790.00
Current price $711.00
$711.00 - $711.00
Current price $711.00

Here, you are looking at the Tomei Expreme Unequal Length Exhaust Manifold Kit. What is special about this particular header, is that it is the wor...

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

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

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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Tomei Expreme Unequal Length Headers 2002-2014 WRX/ 2004-2021 STI

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

This is the Tomei Expreme Unequal Length Exhaust Manifold. This is a direct replacement for your factory exhaust manifold to save weight, improve t...

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

Original price $2,640.40
Original price $2,640.40 - Original price $2,640.40
Original price $2,640.40
Current price $1,399.00
$1,399.00 - $1,399.00
Current price $1,399.00

DESCRIPTION The Invidia Gemini R400 Single Layer Cat-Back Exhaust System with Titanium Burnt Tips is a premium performance upgrade for 2015-2021 Su...

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GrimmSpeed Equal Length Headers 2015-2021 WRX

Original price $944.00
Original price $944.00 - Original price $944.00
Original price $944.00
Current price $849.60
$849.60 - $849.60
Current price $849.60

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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Remark Sports Touring Catback 2015-2021 WRX/STI

Original price $1,395.00 - Original price $1,595.00
Original price
$1,395.00 - $1,595.00
$1,395.00 - $1,595.00
Current price $1,395.00

Part Number RK-C4076S-01 Non-Res Stainless Steel RK-C4076S-01C Resonated Stainless Steel RK-C4076S-01T Non-Res Burnt Stainless RK-C407...

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GrimmSpeed 2 Bolt Up-Pipe 2002-2014 WRX / 2004-2021 STI

Original price $279.00
Original price $279.00 - Original price $279.00
Original price $279.00
Current price $251.10
$251.10 - $251.10
Current price $251.10

DESCRIPTION We designed this up pipe using our in-house FARO Arm along with the latest and greatest Solidworks CAD Software. This assures that we c...

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GrimmSpeed Un-Resonated Catback 2011-2021 WRX/STI

Original price $1,419.00
Original price $1,419.00 - Original price $1,419.00
Original price $1,419.00
Current price $1,277.10
$1,277.10 - $1,277.10
Current price $1,277.10

DESCRIPTION The GrimmSpeed Cat-Back Exhaust System has combined premium materials, along with a larger piping diameter and smooth bends to provide ...

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GrimmSpeed Resonated Catback 2011-2021 WRX/STI

Original price $1,532.00
Original price $1,532.00 - Original price $1,532.00
Original price $1,532.00
Current price $1,378.80
$1,378.80 - $1,378.80
Current price $1,378.80

DESCRIPTION The GrimmSpeed Cat-Back Exhaust System has combined premium materials, along with a larger piping diameter and smooth bends to provide ...

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Grimmspeed Turbo to J-Pipe Gasket 2015-2021 WRX

Original price $31.00
Original price $31.00 - Original price $31.00
Original price $31.00
Current price $27.90
$27.90 - $27.90
Current price $27.90

DESCRIPTION The Grimmspeed Turbo to J-Pipe Gasket is a multi-layer stainless steel gasket designed to provide an optimal seal between the turbochar...

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GrimmSpeed J-Pipe Hardware Kit 2015-2021 WRX

Original price $52.00
Original price $52.00 - Original price $52.00
Original price $52.00
Current price $46.80
$46.80 - $46.80
Current price $46.80

DESCRIPTION The turbo studs on the FA turbo motors are notoriously difficult to deal with. If you're lucky enough to get the nuts off without drama...

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PLM Midpipe 2015-2021 WRX/STI

Original price $495.00 - Original price $545.00
Original price
$495.00 - $545.00
$495.00 - $545.00
Current price $495.00

PLM Private Label Mfg. Power Driven 3" Non-Resonated Midpipe Kit for Subaru WRX STI 3" 2015-2019 was made for maximizing HP gains, more flow, more ...

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PLM Equal Length Headers 2015-2021 STI

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

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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PLM EWG Equal Length Headers 2015-2021 WRX

Original price $695.00 - Original price $1,375.00
Original price
$695.00 - $1,375.00
$695.00 - $1,375.00
Current price $695.00

PLM Private Label Mfg. Power Driven Subaru Impreza WRX Header 2015 - 2020 Equal Length Header with EWG External Wastegate ( Turbo Manifold ) By ch...

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PLM Catted J-Pipe 2015-2021 WRX

Original price $575.00 - Original price $575.00
Original price
$575.00
$575.00 - $575.00
Current price $575.00

PLM Private Label Mfg. Power Driven Subaru WRX J-Pipe Downpipe 2015+ features a 3.5 inch diameter turbine outlet collector that smoothly transition...

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PLM Axle-Back Muffler Deletes 2015-2021 WRX/STI

Original price $349.00
Original price $299.00 - Original price $349.00
Original price $349.00
$279.20 - $299.00
$279.20 - $299.00
Current price $279.20

PLM (Private label Mfg.) Axle-Back exhaust also known as Muffler Bypass, Muffler Deletes, or Track Pipes are made of tig welded stainless steel, li...

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PLM EWG 44mm Up-Pipe w/ Dump Tube 2002-2014 WRX / 2004-2021 STI

Original price $339.00
Original price $339.00 - Original price $339.00
Original price $339.00
Current price $271.20
$271.20 - $271.20
Current price $271.20

PLM Power Driven Subaru 44mm EWG Up-Pipe with Dump Tube features a unique designed Up-pipe which gives you the option to install a 44mm or 45mm ext...

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ETS Axleback Midpipe 2015-2021 WRX/STI

Original price $745.00 - Original price $845.00
Original price
$745.00 - $845.00
$745.00 - $845.00
Current price $745.00

ETS Axleback Conversion Kit 2015-2021 WRX/STI

Original price $645.00 - Original price $895.00
Original price
$645.00 - $895.00
$645.00 - $895.00
Current price $645.00

ETS now offers the catback rear secion separately if you're looking to change up your ETS 2015-2021 WRX/STI exhaust system!  Extreme - No Muffler...

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ETS Mid-Pipe 2015-2021 STI

Original price $459.00 - Original price $559.00
Original price
$459.00 - $559.00
$459.00 - $559.00
Current price $459.00

ETS Axle Back Exhaust System 2015-2021 WRX/STI

Original price $595.00 - Original price $695.00
Original price
$595.00 - $695.00
$595.00 - $695.00
Current price $595.00

The ETS Axle-back exhaust for the 2015-2021 WRX and STI utilizes a full stainless steel construction. The axle back is 2.5" that mates to the stoc...

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AWE Tuning Touring Edition Catback Exhaust 2011-2014 WRX / 2011-2021 STI

Original price $1,545.00 - Original price $1,600.00
Original price
$1,545.00 - $1,600.00
$1,545.00 - $1,600.00
Current price $1,545.00

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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Invidia N1 Titanium Catback Exhaust 2015-2021 WRX/STI

Original price $2,622.20
Original price $2,622.20 - Original price $2,622.20
Original price $2,622.20
Current price $1,704.43
$1,704.43 - $1,704.43
Current price $1,704.43

DESCRIPTION The Invidia N1 Full Titanium Cat-Back Exhaust System with Burnt End Tips is the ultimate upgrade for 2015-2021 Subaru WRX and STI owner...

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Corsa Performance Catback Exhaust Polished Black Tips 2015-2021 WRX/STI

Original price $1,928.99 - Original price $1,928.99
Original price
$1,928.99
$1,928.99 - $1,928.99
Current price $1,928.99

Here, you are looking at the Corsa Performance 3-Inch Dual Rear Exit Catback Exhaust System with Twin 3.5-inch Tips. This exhaust system has been d...

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Corsa Performance Catback Exhaust Polished Tips 2015-2021 WRX/STI

Original price $1,856.99 - Original price $1,856.99
Original price
$1,856.99
$1,856.99 - $1,856.99
Current price $1,856.99

Here, you are looking at the Corsa Performance 3-Inch Dual Rear Exit Catback Exhaust System with Twin 3.5-inch Tips. This exhaust system has been d...

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GrimmSpeed 2 Bolt Ceramic Coated Up-Pipe 2002-2014 WRX / 2004-2021 STI

Original price $309.00
Original price $309.00 - Original price $309.00
Original price $309.00
Current price $278.10
$278.10 - $278.10
Current price $278.10

DESCRIPTION The GrimmSpeed Ceramic Coated 2 Bolt Up-Pipe has been designed to be a high-performance direct replacement for your factory up-pipe to ...

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GrimmSpeed Donut Gasket 2002-2014 WRX / 2004-2021 STI

Original price $17.00
Original price $17.00 - Original price $17.00
Original price $17.00
Current price $15.30
$15.30 - $15.30
Current price $15.30

DESCRIPTION This is the GrimmSpeed Downpipe Donut Gasket. This gasket is available as a direct replacement for your leaking OEM donut gasket and fe...

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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!