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Cat-Back Exhaust System for 2002-07 WRX/STI


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Was: $675.00
Sale: $607.50
Save: 10%
Save: $67.50


Single Tip, Cat-Back Exhaust

Straight Through Muffler

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

4" Slash Cut Tip

An over-sized 4" slash cut exhaust tip adds an aggressive look to this impressive system. PERRIN exhaust tips are a high polished, single wall construction and will not dis-color with extreme heat.


PERRIN performance exhaust systems features 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 repeatable joint with the ability to rotate each joining connection. This allows for easy installation, and alignment adjustments for a perfect fit every time.

304SS Tubing

PERRIN Performance 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 makes power, but sound level & tone should also be a concern. Our system is designed to have a very mellow and pleasing note while not producing loud "farty" sounds that wakes up neighbors.
» Listen to the clip


Installed Photos

Click on the photo to the left to view a slideshow of this part and other like parts installed.


The PERRIN exhaust systems comes with a brushed stainless steel finish.

Lifetime Warranty

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


Download Instructions

Warranty Details

This product features a lifetime warranty Read Full Warranty

Tech Department




Product Weight 30 lbs.
Material 304 Stainless Steel


Sound Clip

In The Box

In The Box

(1) PERRIN single-tip muffler
(1) PERRIN mid-pipe
Necessary hardware included
(1) PERRIN License Plate Frame

Dyno Charts

Dyno Charts

Proven Horse Power

Dyno Chart

07 STI Catback Dyno Test

This test was done on an 07 STI that was running stock ECU tuning. We swapped out the exhaust in roughly 5minutes and re-dynoed the car to find 15WHP and 15ft-lbs of TQ had. So not only does this add some really cool sounds but also a bit of HP, all while increasing your fuel economy.

Dyno Chart

2.5L WRX Catback Test

This was done on our 08 WRX running a Stage 1 AccessPORT tune, this represents exactly what we see for WHP changes on all the WRX models. The gains we see of about 5-8WHP is very typical on both the 2.5L and 2.0L WRX's after installing our 3" Catback exhaust.

Compatibility Notes


1993-2007 Impreza No
2002-2007 WRX Yes
2004-2007 STI Yes


Shipping Information

  • Item Requires Shipping
  • 41.0 lbs.
  • W10.0000” x H19.0000” x L61.0000”