Skip to content
CHRISTMAS SAVINGS ARE LIVE!
CHRISTMAS SAVINGS ARE LIVE!

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...

View full details

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...

View full details

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...

View full details

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...

View full details

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...

View full details

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...

View full details

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 ...

View full details

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 ...

View full details

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...

View full details

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...

View full details

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...

View full details

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...

View full details

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

Original price $2,674.00
Original price $2,674.00 - Original price $2,674.00
Original price $2,674.00
Current price $1,738.10
$1,738.10 - $1,738.10
Current price $1,738.10

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

View full details

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

Original price $2,480.80
Original price $2,480.80 - Original price $2,480.80
Original price $2,480.80
Current price $1,612.52
$1,612.52 - $1,612.52
Current price $1,612.52

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

View full details

Invidia Full Titanium Single Exit Catback Exhaust 2015-2021 WRX/STI

Original price $2,102.80
Original price $2,102.80 - Original price $2,102.80
Original price $2,102.80
Current price $1,366.82
$1,366.82 - $1,366.82
Current price $1,366.82

DESCRIPTION The Invidia Full Titanium Cat-Back Exhaust System is the pinnacle of performance and design for 2015-2021 Subaru WRX and STI models. Cr...

View full details

Invidia Q300 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 $1,716.26
$1,716.26 - $1,716.26
Current price $1,716.26

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

View full details

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

Original price $2,480.80
Original price $2,480.80 - Original price $2,480.80
Original price $2,480.80
Current price $1,612.52
$1,612.52 - $1,612.52
Current price $1,612.52

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

View full details

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

Original price $1,869.00
Original price $1,869.00 - Original price $1,869.00
Original price $1,869.00
Current price $1,214.85
$1,214.85 - $1,214.85
Current price $1,214.85

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...

View full details

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

Original price $1,813.00
Original price $1,813.00 - Original price $1,813.00
Original price $1,813.00
Current price $1,178.45
$1,178.45 - $1,178.45
Current price $1,178.45

DESCRIPTION The Invidia N1 Cat-Back Exhaust System with Stainless Steel Tips is the ultimate upgrade for 2015-2021 Subaru WRX and STI enthusiasts. ...

View full details

Invidia Q300 Resonated Single Exit Catback 2015-2021 WRX/STI

Original price $1,666.00
Original price $1,666.00 - Original price $1,666.00
Original price $1,666.00
Current price $1,082.90
$1,082.90 - $1,082.90
Current price $1,082.90

DESCRIPTION The Invidia Q300 Single Exit Cat-Back Exhaust System with Stainless Steel Tip is a premium performance upgrade for 2015-2021 Subaru WRX...

View full details

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

Original price $1,390.20
Original price $1,390.20 - Original price $1,390.20
Original price $1,390.20
Current price $903.63
$903.63 - $903.63
Current price $903.63

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...

View full details

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

Original price $1,587.60
Original price $1,587.60 - Original price $1,587.60
Original price $1,587.60
Current price $1,031.94
$1,031.94 - $1,031.94
Current price $1,031.94

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....

View full details

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

Original price $1,587.60
Original price $1,587.60 - Original price $1,587.60
Original price $1,587.60
Current price $1,031.94
$1,031.94 - $1,031.94
Current price $1,031.94

DESCRIPTION The Invidia N1 Single Exit Cat-Back Exhaust System with Stainless Steel Tip is a high-performance upgrade tailored for 2015-2021 Subaru...

View full details

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

Original price $1,390.20
Original price $1,390.20 - Original price $1,390.20
Original price $1,390.20
Current price $903.63
$903.63 - $903.63
Current price $903.63

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...

View full details

MBRP Race 3" Stainless Steel Quad Tip Catback Exhaust 2015-2021 WRX/STI

Original price $934.99 - Original price $934.99
Original price
$934.99
$934.99 - $934.99
Current price $934.99

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...

View full details

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

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

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...

View full details

Remark R1-Spec Stainless Steel Catback Exhaust 2015-2021 WRX/STI

Original price $995.00 - Original price $995.00
Original price
$995.00
$995.00 - $995.00
Current price $995.00

This is the Remark R1-Spec Cat-Back Exhaust System. This is a high-performance exhaust system inspired by track-oriented exhaust systems designed w...

View full details

Remark R1-Spec Titanium Catback Exhaust 2015-2021 WRX/STI

Original price $1,095.00 - Original price $1,095.00
Original price
$1,095.00
$1,095.00 - $1,095.00
Current price $1,095.00

This is the Remark R1-Spec Cat-Back Exhaust System. This is a high-performance exhaust system inspired by track-oriented exhaust systems designed w...

View full details

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

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

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...

View full details

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

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

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...

View full details

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

Original price $1,345.00 - Original price $1,345.00
Original price
$1,345.00
$1,345.00 - $1,345.00
Current price $1,345.00

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...

View full details

ETS Extreme Resonated Catback Stealth Black Tips 2015-2021 WRX/STI

Original price $1,445.00 - Original price $1,445.00
Original price
$1,445.00
$1,445.00 - $1,445.00
Current price $1,445.00

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...

View full details

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

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

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...

View full details

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

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

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...

View full details

ETS Muffled Non-Resonated Polished Tips 2015-2021 WRX/STI

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

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...

View full details

ETS Muffled Non-Resonated Burnt Tips 2015-2021 WRX/STI

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

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...

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!