Cat-Back Exhaust System Resonated for 2008-14 STI, 2011-14 WRX Hatch


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Sale: $900.00
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The 2008-2014 STI and 2011-2014 WRX is quiet in stock form, so we had to create a louder exhaust.

High Tech Mufflers

PERRIN mufflers have a true 3" inlet pipe that carries exhaust into a center chamber before being distributed to two 2.25" exhaust pipes which continue on to the tips.

3.5" Slash Cut Tips

The PERRIN Cat-Back Exhaust features four slash cut exhaust tips which adds an aggressive look to this impressive system. PERRIN Exhaust tips are brushed stainless steel, single wall construction stainless steel and will not discolor with extreme heat.


PERRIN Exhaust systems feature high tech v-band clamps for a perfect exhaust connection. V-band clamps are designed to hold hundreds of pounds of pressure and do so without the need for a gasket! This connection allows for a precise and repeatable joint with the ability to rotate each joining connection. This makes installation much easier and alignment adjustments for a perfect fit every time.


PERRIN Exhaust systems come in a brushed stainless steel finish.

304SS Tubing

PERRIN Exhaust systems are made entirely of 304 stainless steel, inside and out. 304SS provides high corrosion resistance, and is excellent for extreme heat up to 1800 degrees. Other manufactures and OEMs, will use cheaper 409 stainless steel which will rust and corrode over time but the added expense of 304 stainless steel is well worth the beautiful and long lasting high polish, and durability.

Sound Clip

It is very important to us for our exhaust to make power, but sound level and tone should also be a concern. Our system is designed to have a low and pleasing rumble while not producing the loud, rough drone that wakes your neighbors!
» Listen to the clip

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


Warranty Details

This product features a lifetime warranty Read Full Warranty

Tech Department




Product Weight 43 lbs.
Material 304 Stainless Steel


Exhaust Sound Clip

In The Box

In The Box

(1) PERRIN WRX/STI Muffler
(1) PERRIN Midpipe
(1) Gasket
Necessary hardware
(1) PERRIN License Plate Frame

Dyno Charts

Dyno Charts

Proven Horse Power

Dyno Chart

08 STI Catback Dyno Test

This test was done on an 08 STI that was running our AccessPORT Stage 1 mapping. We swapped out the exhaust in roughly 5 minutes and re-dynoed the car to find 10WHP and 10ft-lbs of torque from the cat-back. So not only does this add a really cool tone buy also power, all while increasing your fuel economy.

Compatibility Notes


2008-2014 STI Hatchback Yes
2011-2014 WRX Hatchback Yes


Shipping Information

  • Item Requires Shipping
  • 90.0 lbs.
  • W11.0000” x H25.0000” x L46.0000”
  • This item ships in its own box.