See all Exhaust Parts products

Mishimoto Cat-Back Exhaust - MMEXH-WRX-15

Mishimoto Cat-Back Exhaust - MMEXH-WRX-15 - Image 2

Mishimoto Cat-Back Exhaust - MMEXH-WRX-15 - Image 3

Mishimoto Cat-Back Exhaust - MMEXH-WRX-15 - Image 4

Mishimoto Cat-Back Exhaust - MMEXH-WRX-15 - Image 5

Mishimoto Cat-Back Exhaust - MMEXH-WRX-15 - Image 6

Mishimoto Cat-Back Exhaust - MMEXH-WRX-15 - Image 7

Mishimoto Cat-Back Exhaust

~~$1,460.00~~ SALE: $1,326.95

As low as $139/mo^* with Affirm. Financing Options

Free Shipping

Add to Wishlist

Model#MMEXH-WRX-15
ManufacturerMishimoto

Have a Question?

Live Chat (480) 966 3040

BEST PRICES, AMAZING SERVICE

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 dont have to worry about your hardware rusting ever again! It also comes with the Mishimoto Lifetime Warranty you know and trust.

Purchase 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 Gasket
(2) 3/8"16, 1-1/2-inch Hex Bolts, Stainless Steel
(2) 3/8"16 Serrated Flange Hex Nuts, Stainless Steel
(2) M10 Washers, Stainless Steel
Mishimoto Lifetime Warranty

Features:

32.25" exhaust split helps maintain proper exhaust velocity
Designed with oval mufflers to prevent highway drone
Direct fit for the 2015-2021 Subaru WRX/STI
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)
Extremely aggressive turbo and exhaust tone under acceleration and boost
Full 304 stainless steel mandrel-bent construction
Installs in under an hour
Mates with most aftermarket downpipes
Mishimoto Lifetime Warranty
Quad 3.5" staggered double wall, polished tips
TIG-Welded to perfection

Specifications:

Material: 304 Stainless Steel
Pipe Diameter: 3
Weight (Pounds): 42

Fitment:

Subaru WRX STI Base 2015-2021
Subaru WRX STI Launch Edition 2015
Subaru WRX Base 2015-2021
Subaru WRX Premium 2015-2021
Subaru WRX STI 2015-2016
Subaru WRX STI Limited 2015-2021
Subaru WRX Limited 2015-2021
Subaru WRX STI Series.HyperBlue 2016
Subaru WRX STI Sport-tech 2017-2021
Subaru WRX Sport-tech 2017-2021
Subaru WRX STI Sport 2017-2021
Subaru WRX Sport 2017-2021
Subaru WRX STI Type RA 2018
Subaru WRX CVT 2018-2021
Subaru WRX STI STI 2018-2021
Subaru WRX 6 Man 2018-2021
Subaru WRX Raui Edition 2019
Subaru WRX STI S209 2019
Subaru WRX Sport-tech RS 2019-2020
Subaru WRX STI Kanrai Edition 2020
Subaru WRX EyeSight 2021
Chassis Codes: VA/GH
Engine Codes: FA20DIT/ EJ257

Other Part Numbers:
Mishimoto #misMMEXH-WRX-15

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Mishimoto Banner

Who is Mishimoto?

Mishimoto is an aftermarket automotive company that was established in 2005. They are known for creating the industry’s best performing cooling system components. Today, they have become the market leader and has been chosen by various enthusiasts worldwide.

Parts for All Your Cooling Needs

Mishimoto offers a wide range of products such as couplings, radiators, fans, and other cooling system components for practically every vehicle, may it be a sport compact, truck, jeep, muscle cars, and classic vehicles. They also offer intake systems and intercoolers that help the vehicle gain more horsepower.

Built to Perform Better

The company creates products that are better than the stock components. Their parts are designed to work in higher pressure ratings and are more robust. Hence, they are the brand of choice by tuners and enthusiasts who demand a cooling system that can work for high-performance applications. Many racers choose Mishimoto as it has proven itself to produce race winners whatever racing discipline it is, may it be circuit racing, drag racing, drifting, and off road racing.

Purchase Mishimoto Products at Vivid Racing

Your vehicle cooling system plays a critical role in your vehicle. It keeps the temperature at bay and prevents severe damages caused by overheating. If you want a product that can put your trust in, then Mishimoto is the brand for you. Tested by many racers on the track and a variety of car enthusiasts on the street, you can be sure that you will never go wrong with Mishimoto.

Visit Vivid Racing and check out their list of products that would fit your specific needs.

Mishimoto Automotive ("Mishimoto") warrants its products under this lifetime limited warranty policy ("Warranty Policy"). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a "Mishimoto Product" and collectively, the "Mishimoto Products") and (ii) the original purchaser of such Mishimoto Product ("Purchaser"). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.

Pursuant to the terms and conditions of this Warranty Policy, after submission of a valid claim by a Purchaser and regardless of the condition of the product for which such valid claim is submitted, if it is determined by Mishimoto that such Mishimoto Product was not manufactured to Mishimoto's advertised specifications or if such claim was submitted pursuant to Mishimoto's Accident Protection Plan, as described herein, Mishimoto will, at its discretion: (i) repair or replace Purchaser's original Mishimoto Product; (ii) replace Purchaser's original Mishimoto Product with the most current available model (if, for example, the original model of the product for which a valid claim has been submitted is not available); or (iii) provide the purchaser with a gift card redeemable at Mishimoto.com in the amount of the original purchase price of the original Mishimoto Product (if, for example, Mishimoto has discontinued support for a Purchaser's specific application).

To submit a claim for a Mishimoto Product under this Warranty Policy, you must: (i) fully and accurately fill out the online form provided below; and (ii) provide Mishimoto with a copy of an original sales receipt indicating that you are the original Purchaser of the Mishimoto Product for which the claim is being submitted (you must also provide the information described in the paragraph of this Warranty Policy titled "Mishimoto Accident Protection Plan" if you are submitting a claim for a Mishimoto Product damaged in an accident). In addition, if requested by Mishimoto, you must also send the Mishimoto Product for which a claim is being made, all transportation expenses prepaid, to Mishimoto.

You're seeing this because you're logged into an employee account or you're accessing the site through an internal IP address. This information is not normally visible.

Things

Sale price	None
Wholesale price	$1,252.64
Shipping	Weight: 52.00 Length: 58 Width: 24 Height: 11
Product Added At	Tuesday 14 July, 2020
Product Modified At	Friday 11 July, 2025
Imported By	ETLOverride
Last Edited By	Turn_API
	View In Admin

Emissions Info

Carb Approved	Yes
Carb Number	-
Epa Status	N/A
Prop65	Unknown
Carb Required	-

Vendors

Some placeholder content for the collapse component. This panel is hidden by default but revealed when the user activates the relevant trigger.

	Vendor	Inv	Cost	Retail	Jobber	MAP	Core	Updated
	Turn 14		$1,061.56	$1,460.00	?	$1,326.95	?	2025-07-11 10:33:55

Check out these other great products

Error: Failed to add product

Please refresh the page and try again.