Go-Parts
Cart 0
Your cart is empty
Add an item to see it appear here.

2015 - 2021 Subaru WRX Exhaust System Kit (Mishimoto) NEW

Out of Stock
$ 1,326 .95
120-DayReturns
LifetimeWarranty
100%Money-Back

Product Notes Read before buying

Mishimoto is proud to release the Performance Cat-back for the 2015+ Subaru WRX/STI. The biggest complaint is the stock cat-back exhaust systems lack of aggressiveness. By installing the Mishimoto Performance Stainless Steel Cat-back, the exhaust system is able to breathe easier, providing horsepower, torque, and a rich exhaust tone. After comparing many different muffler sizes and designs, the Engineers at Mishimoto chose oval mufflers which prevent highway drone, but still provide an aggressive exhaust tone. During dyno pulls with the 2015+ Subaru WRX/STI w/ CVT, Mishimoto'saw gains of up to 9 whp and 8 wtq using 93 octane fuel while maintaining safe AFRs on a stock tune (see additional images for dyno chart). This exhaust installs in under one hour and features quad 3.5in staggered double wall polished tips. The Mishimoto Performance Cat-back Exhaust provides an extremely aggressive turbo and exhaust tone under acceleration and boost, giving you that aggressive tone you have been looking for! The engineers at Mishimoto designed this cat-back as a four-piece design with precision TIG welded 304 Stainless Steel. This allows a smooth exhaust flow from the 3.0in 2-bolt exhaust flange all the way through the 2.25in y-section. To top it off, this cat-back includes two 2.25in V-Band clamps, a 3in exhaust band clamp, a new 3in 2-bolt flange gasket, and all stainless steel hardware, so you don't have to worry about your hardware rusting ever again! For 2015 WRX owners looking to get the most out of their WRX, this cat-back exhaust mates perfectly with the Mishimoto Performance Downpipe. The Mishimoto Cat-Back Exhaust is proudly made in the USA and comes with the Mishimoto Lifetime Warranty you know and trust.
Brand: Mishimoto
Condition: New
Wrenchy the Robot
Not sure? Ask WrenchyYour Parts Assistant.

Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.

Specifications & Info


Attribute Value
Install Difficulty 2
Prop 65 (C, R Or CR) Cr
SellingPoint01 Direct Fit For The 2015-2021 Subaru Wrx/sti
SellingPoint02 Dyno-proven Maximum Gains Of Up To 9 Whp And 8 Wtq And Peak Gains Of Up To 4 Whp And 3 Wtq Using 93 Octane Fuel While Maintaining Safe Afrs On The Stock Tune (2015 Wrx W/ Cvt)
SellingPoint03 Extremely Aggressive Turbo And Exhaust Tone Under Acceleration And Boost
SellingPoint04 Mates With The Mishimoto, Stock, Or Most Aftermarket Downpipes
SellingPoint05 Installs In Under An Hour
SellingPoint06 Designed With Oval Mufflers To Prevent Highway Drone
SellingPoint07 Quad 3.5-in Staggered Double Wall, Polished Tips
SellingPoint08 Full 304 Stainless Steel Mandrel-bent Construction
SellingPoint09 3-in To 2.25-in Exhaust Split Helps Maintain Proper Exhaust Velocity
SellingPoint10 Tig-welded To Perfection
SellingPoint11 Mishimoto Lifetime Warranty
SellingPoint12 N/a
SellingPoint13 N/a
SellingPoint14 N/a
SellingPoint15 N/a
TechSpec Applications 2015-2021 Subaru Wrx--2015-2021 Subaru Sti
TechSpec Chassis Codes Va--gh
TechSpec Engine Codes Fa20dit-- Ej257
TechSpec Includes (1) Stainless Steel Mid-pipe W/ 2-bolt Flange--(1) Stainless Steel Mid-pipe To Y-section--(2) Stainless Steel Mufflers W/ Quad 3.5-inch Staggered Double Wall Tips, Polished--(2) 2.25-inch V-band Clamps--(1) 3-inch Exhaust-band Clamp--(1) 2-bolt Flange Gas
TechSpec Material 304 Stainless Steel
TechSpec Note This Product Has Been Designed To Fit Both Manual And Cvt Transmission Vehicles.----mishimoto Does Not Recommend Installing This Cat-back Exhaust And The Mishimoto Performance Air Intake With The Stock Ecu Programming. It Is Recommended That The Customer
TechSpec Overall Height (Inches) N/a
TechSpec Overall Length (Inches) N/a
TechSpec Pipe Diameter 3
TechSpec Weight (Pounds) 42

Vehicle Fitment Guide

This part fits the following vehicles:

Subaru 1 model (tapclick to expand)(tapclick to hide)
WRX 2015-2021 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL
Body Style Years Engine Attributes
6 Man Sedan 2018 - 2021 H4 2.0L Turbo AWD Manual
Base Sedan 2015 - 2021 H4 2.0L Turbo AWD Manual
Base Sedan 2015 - 2017, 2019 - 2020 H4 2.0L Turbo AWD Automatic CVT
CVT Sedan 2018 - 2021 H4 2.0L Turbo AWD Automatic CVT
EyeSight Sedan 2021 H4 2.0L Turbo AWD Automatic CVT
Limited Sedan 2015 - 2021 H4 2.0L Turbo AWD Automatic CVT & Manual
Premium Sedan 2015 - 2021 H4 2.0L Turbo AWD Automatic CVT & Manual
Raui Edition Sedan 2019 H4 2.0L Turbo AWD Manual
STI Sedan 2015 - 2016 H4 2.5L Turbo AWD Manual
Sport Sedan 2019 - 2021 H4 2.0L Turbo AWD Automatic CVT
Sport Sedan 2017 - 2021 H4 2.0L Turbo AWD Manual
Sport-tech Sedan 2019 - 2021 H4 2.0L Turbo AWD Automatic CVT
Sport-tech Sedan 2017 - 2021 H4 2.0L Turbo AWD Manual
Sport-tech RS Sedan 2019 - 2020 H4 2.0L Turbo AWD Manual
Verify before ordering — please confirm your vehicle's year, make, model and sub-model specifications before placing your order. If anything is unclear, our customer service team is available to help.

Policies, in plain English.

Shipping Information

We offer fast, reliable shipping on all orders:

  • Ships to all countries via US Postal Service Priority Mail.
  • Most orders ship within 1 business day.
  • Delivery time: 1-4 business days after shipment.
  • International shipping available, including APO/FPO addresses.
  • Tracking information provided for all shipments.
  • Additional handling fees may apply for oversized/overweight packages.

Lifetime Warranty

This part comes with a limited lifetime warranty. Warranty begins on the original purchase date.

Warranty does NOT cover:

  • Shipping costs or labor expenses.
  • Installation errors.
  • Parts used for racing.
  • Commercial vehicle parts.

Returns (120 Days)

We want you to be 100% satisfied with your purchase. That's why we offer:

  • 120-Day Returns - Return any part within 120 days from date of receipt.
  • Must obtain RMA (Return Merchandise Authorization) number before returning.
  • Parts must be in original condition, uninstalled, unaltered, and in original packaging.
  • Important: Electrical parts are not returnable if unsealed.
  • Please inspect parts upon arrival and notify us within 5 days of receiving incorrect or damaged parts.
  • Refunds processed after warehouse receives return and credited to original payment method.
Mishimoto is proud to release the Performance Cat-back for the 2015+ Subaru WRX/STI. The biggest complaint is the stock cat-back exhaust systems lack of aggressiveness. By installing the Mishimoto Performance Stainless Steel Cat-back, the exhaust system is able to breathe easier, providing horsepower, torque, and a rich exhaust tone. After comparing many different muffler sizes and designs, the Engineers at Mishimoto chose oval mufflers which prevent highway drone, but still provide an aggressive exhaust tone. During dyno pulls with the 2015+ Subaru WRX/STI w/ CVT, Mishimoto'saw gains of up to 9 whp and 8 wtq using 93 octane fuel while maintaining safe AFRs on a stock tune (see additional images for dyno chart). This exhaust installs in under one hour and features quad 3.5in staggered double wall polished tips. The Mishimoto Performance Cat-back Exhaust provides an extremely aggressive turbo and exhaust tone under acceleration and boost, giving you that aggressive tone you have been looking for! The engineers at Mishimoto designed this cat-back as a four-piece design with precision TIG welded 304 Stainless Steel. This allows a smooth exhaust flow from the 3.0in 2-bolt exhaust flange all the way through the 2.25in y-section. To top it off, this cat-back includes two 2.25in V-Band clamps, a 3in exhaust band clamp, a new 3in 2-bolt flange gasket, and all stainless steel hardware, so you don't have to worry about your hardware rusting ever again! For 2015 WRX owners looking to get the most out of their WRX, this cat-back exhaust mates perfectly with the Mishimoto Performance Downpipe. The Mishimoto Cat-Back Exhaust is proudly made in the USA and comes with the Mishimoto Lifetime Warranty you know and trust.

Fits Years: 2015 2016 2017 2018 2019 2020 2021

Fits Models: WRX

Why Millions Choose Go-Parts

Your Go-To Place
for auto parts.

In operation since 2007. Trusted by over a million DIYers, mechanics, and body shops across all 50 states.

100%
Money-Back Guarantee

Shop With Total Confidence

If it doesn't fit, we make it right. No gimmicks, no fine print.

120
Day Return Window

4× the Industry Standard

Most retailers stop at 30 days. We give you a full four months to install, test, and return for a 100% refund — return shipping on us.

NEW
Direct-Fit Replacement

Engineered To OEM Specs

Brand-new aftermarket parts from trusted suppliers — built to original-equipment specifications so they fit and function like the factory unit, at a fraction of the price.

What buyers are saying.

★★★★★ 4.9 1,451 verified reviews

Racing Partner Videos

×

Search by Vehicle

1
2
3
Added to cart · Part