Cat-Back Exhaust Dual Tube Non-Resonated for 2011-18 WRX/STI Sedan


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Sale: $1,057.50
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Similar to the existing PERRIN Cat-back Exhaust for 2011-2018 WRX & STI, the PERRIN Cat-back Dual Tube Exhaust fills the same gap, but with a couple of differences. The dual tube mid pipe design produces a smoother exhaust note and has the ability to flow more air.

Material and Finish

PERRIN exhaust systems are made entirely of 304 stainless steel. 304SS provides high corrosion resistance and is excellent for heat up to 1800 degrees Fahrenheit. Other manufactures may use cheaper 409 stainless steel which will rust and corrode over time, but the added expense of 304 stainless steel is well worth it for the beautiful, long lasting, high brushed finish and durability.

Exhaust Union Clamps

The PERRIN Dual Tube Cat-back Exhaust is made up of a midpipe, y-pipe, and mufflers. These pieces all connect to one another with exhaust union clamps. These clamps are all long enough to allow for fine adjustments with your exhaust components to get that perfect fitment and get your exhaust tips exactly where you want them.

Straight Through Muffler

PERRIN mufflers have a true 3" internal diameter for uninterrupted exhaust flow. PERRIN mufflers and Y-pipe connections are 3" throughout the entire length, not necked down, for ultra smooth transitions throughout the system.

3.5" Straight Cut Tips

Over-sized 3.5" straight cut exhaust tips add an aggressive look to this impressive system. PERRIN exhaust tips sport a more heat-resistant brushed finish compared to the rest of the exhaust system and are of a single wall construction that will not discolor with extreme heat.

Adjustable Y-Pipe

Our Y-pipe splitter attaches to the mufflers and midpipe with union clamps which let you adjust muffler location and tip placement to perfectly sit in your bumper cutouts.


Each PERRIN exhaust system comes with a brushed stainless steel finish for corrosion resistance and good looks.

Lifetime Warranty

PERRIN Performance warrants to the original purchaser, all PERRIN cat-back exhaust systems to be free from defects in material and workmanship. *Some exclusions apply
» Read Full Warranty

Off Road Use Only

This product is legal in California only for racing vehicles which may never be used upon a highway. Check your local and federal laws prior to installation.
» Learn More


Warranty Details

This product features a lifetime warranty Read Full Warranty

Tech Department




Product Weight 52 lbs.
OEM Exhaust Weight 39 lbs.
Material 304 Stainless Steel

Compatibility Detail


2011-2014 WRX Sedan Yes
2015-2018 WRX Yes
2011-2014 STI Sedan Yes
2015-2018 STI Yes

In The Box

In The Box

(2) PERRIN Quad-tip Mufflers
(1) PERRIN Mid-pipe
(1) PERRIN Y-pipe
All necessary hardware
(1) PERRIN License Plate Frame



Keep in mind, these tests are ONLY for comparison purposes to help provide an answer to the question "How loud is this?" These tests are not saying any of these systems will pass any local law pertaining to a decibel limit for your car. If you are unsure of a system passing a local decibel limit law, please have a profession test your exhaust to determine if it’s legal.


Shipping Information

  • Item Requires Shipping
  • 88.0 lbs.
  • W11.0000” x H25.0000” x L57.0000”
  • This item ships in its own box.