SKU: 39018444384

Cat-Back Exhaust Subaru WRX/STi 2015+

Sale price$1259.97 Regular price$1399.97
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Description

Cat-Back Exhaust Subaru WRX/STi 2015+Here at Mishimoto we've decided to expand our line of 2015 Subaru WRX performance parts. Mishimoto is proud to release the 2015+ Subaru WRX STI cat back exhaust. One of the biggest complaints 2015 WRX owners have is that the stock 2015 WRX exhaust systems lack an aggressive tone. By installing the Mishimoto 2015 WRX cat back exhaust allows the entire system to breathe easier, providing horsepower, torque, and a rich exhaust tone. After comparing many

Here at Mishimoto we've decided to expand our line of 2015 Subaru WRX performance parts. Mishimoto is proud to release the 2015+ Subaru WRX/STI cat-back exhaust. One of the biggest complaints 2015 WRX owners have is that the stock 2015 WRX exhaust systems lack an aggressive tone. By installing the Mishimoto 2015 WRX cat-back exhaust allows the entire system to breathe easier, providing horsepower, torque, and a rich exhaust tone. After comparing many different muffler sizes and designs, Mishimoto engineers chose oval mufflers to help prevent highway drone but still provide an aggressive exhaust tone for your 2015 WRX. During dyno pulls with the 2015 CVT WRX, 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 2015 WRX exhaust installs in under one hour and features quad 3.5" staggered, double wall polished tips. The Mishimoto 2015 WRX cat-back exhaust provides an extremely aggressive turbo and exhaust tone under acceleration and boost, giving you that sweet tone you've been looking for!

The Mishimoto engineers designed this WRX and STI cat-back exhaust as a four-piece design, comprised of precision TIG-welded, 304 stainless steel. This allows a smooth exhaust flow from the 3.0" 2-bolt exhaust flange all the way through the 2.25" Y-section. To top it off, this 2015 WRX exhaust includes two 2.25" V-band clamps, a 3" exhaust-band clamp, a new 3" 2-bolt flange gasket, and all stainless steel hardware, so you don’t have to worry about rusty hardware! For 2015 WRX or STI owners looking to get the most out of their WRX, this 2015 WRX cat-back exhaust mates perfectly with the Mishimoto Subaru WRX Performance Downpipe. The Mishimoto Subaru WRX Cat-Back Exhaust is proudly made in the USA and, like all our 2015 WRX parts, comes with the Mishimoto Lifetime Warranty.

  • Direct fit for the 2015+ Subaru WRX & STI
  • Mates with the Mishimoto, stock, or most aftermarket downpipes
  • Made in the USA
  • Mishimoto Lifetime warranty
  • Extremely aggressive turbo and exhaust tone under acceleration and boost
  • Designed with oval mufflers to prevent highway drone
  • Installs in under an hour
  • Quad 3.5" staggered double wall, polished tips
  • Full 304 stainless steel mandrel-bent construction
  • 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)
  • TIG-welded to perfection
  • 3" to 2.25" exhaust split helps maintain proper exhaust velocity
  • 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 is able to retune the vehicle’s ECU after installing the cat-back exhaust and the intake. Power gains will vary depending on the type of ECU tune that is applied to the vehicle.
  • Fits - 2015+ Subaru WRX, 15+ Subaru STI
  • Engine Codes - FA20DIT, EJ257
  • Chassis Codes - VA, GH
  • Weight - 42 lbs
  • Diameter - 3.0" from 2.bolt flange to y-section 2.25" y-section to mufflers
  • Flange Material - 304 Stainless Steel
  • Pipe Material - 304 Stainless Steel
  • (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" Staggered Double Wall Tips, Polished
  • (2) 2.25" V-Band Clamps
  • (1) 3" Exhaust-Band Clamp
  • (1) 2-Bolt Flange Gasket
  • (2) 3/8"-16, 1-1/2" Hex Bolts, Stainless Steel
  • (2) 3/8"-16 Serrated Flange Hex Nuts, Stainless Steel
  • (2) M10 Washers, Stainless Steel
  • Mishimoto Lifetime Warran
  • Direct fit for the 2015+ Subaru WRX & STI
  • Extremely aggressive turbo and exhaust tone under acceleration and boost
  • Designed with oval mufflers to prevent highway drone
  • Installs in under an hour
  • Quad 3.5" staggered double wall, polished tips
  • Full 304 stainless steel mandrel-bent construction
  • 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)
  • TIG-welded to perfection
  • 3" to 2.25" exhaust split helps maintain proper exhaust velocity
  • Mates with the Mishimoto, stock, or most aftermarket downpipes
  • Made in the USA
  • Mishimoto Lifetime warranty
  • (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" Staggered Double Wall Tips, Polished
  • (2) 2.25" V-Band Clamps
  • (1) 3" Exhaust-Band Clamp
  • (1) 2-Bolt Flange Gasket
  • (2) 3/8"-16, 1-1/2" Hex Bolts, Stainless Steel
  • (2) 3/8"-16 Serrated Flange Hex Nuts, Stainless Steel
  • (2) M10 Washers, Stainless Steel
  • Mishimoto Lifetime Warranty
  • 2015+ Subaru WRX
  • 2015+ Subarru STI
    Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 39018444384

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    Dawn Workman
    Chelsea, US
    ★★★★★ 5
    Great product
    Theme: Football, Size: Medium
    My pup always love JW toys
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on June 13, 2026
    M
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    MadcapViolet
    Whiting, US
    ★★★★★ 3
    dog's ball
    Theme: Football, Size: Large
    Was too big and very heavy. Smaller would be good for my very large full male german shepherd. But he loves it. Too heave for smaller dog.
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    Reviewed in the United States on January 13, 2026
    M
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    Mike L.
    Massapequa, US
    ★★★★★ 5
    Durable
    Theme: Football, Size: Large
    I have a German Shepherd and a pit mix and they played tug-of-war with this. I’ve had it for about six months and it’s still holding up.
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    Reviewed in the United States on April 17, 2026
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    Shelby Phillips
    Birmingham, US
    ★★★★★ 4
    Not for heavy chewers!
    Theme: Animals, Size: Medium
    Didn't hold up well - but realized I didn't read that it was for "light chewers." Otherwise, cute design.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on January 28, 2026
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    Verified Purchase
    Mark Central CA
    Pawtucket, US
    ★★★★★ 5
    Good for Chewers
    Theme: Football, Size: Large
    Dogs love it, they been chewing on it and it's like new. Also I put treats inside and they really like that. I have a small pit mix and a puppy shepherd husky mutt. They play tug of war with it and it's holding up really good.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 4, 2026

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