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PERRIN Cat Back Exhaust - Subaru WRX/STI 2002-2007
PERRIN Cat Back Exhaust - Subaru WRX/STI 2002-2007
PERRIN Cat Back Exhaust - Subaru WRX/STI 2002-2007
PERRIN Cat Back Exhaust - Subaru WRX/STI 2002-2007
PERRIN Cat Back Exhaust - Subaru WRX/STI 2002-2007
PERRIN Cat Back Exhaust - Subaru WRX/STI 2002-2007
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User Media for: PERRIN Cat Back Exhaust - Subaru WRX/STI 2002-2007
User Media for: PERRIN Cat Back Exhaust - Subaru WRX/STI 2002-2007

PERRIN Cat Back Exhaust

Subaru WRX/STI 2002-2007

Features & Product Details

RallySport Direct proudly carries a massive selection of quality performance upgrades and enhancements brought to you by PERRIN Performance. 

On this page, you are looking at the PERRIN Performance Cat-Back Exhaust System. This is a high-performance exhaust system that produces an aggressive exhaust tone without being too overbearing. This exhaust system combines larger exhaust piping and smoother bends that will limit restriction and turbulence under acceleration to improve the power, the torque, along with reduced turbo lag and improved throttle response.

Here are the details:

  • 304 Stainless steel materials
  • 3" Piping
  • 4" Slash cut exhaust tip
  • V-band connection
  • Brushed stainless steel finish
  • Includes v-band, gasket, and hardware
  • Specifications

    Brand: PERRIN
    Exhaust Orientation: Straight Exit
    Exhaust Weight: 30lbs
    Installation Hardware Included: Yes
    Piping Coating: No
    Piping Flex Joint: Yes
    Piping ID: 3.00in
    Piping Material: 304 Stainless Steel
    Piping Taper: No
    Silencer Included: No
    Tip Material: Stainless Steel
    Tip Qty: 1
    Tip Shape: Round
    Tip Size: 4.00in
    Mfgr. Warranty: Limited Lifetime Warranty
    Condition: New Product
    Return Policy:

    RallySport Guarantee - 30 Days

    Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

    RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

    The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
    RallySport Guarantee
    WARNING: Cancer and Reproductive Harm -



    7 Reviews
    4.9 out of 5 Stars
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    Customer Photos and Videos
    PERRIN Cat Back Exhaust ( Part Number: PSP-EXT-305BR)
    PERRIN Cat Back Exhaust ( Part Number: PSP-EXT-305BR)
    Perrin Cat Back Exhaust  2 years ago
    5out of 5stars

    If you are looking for a low key great sounding exhaust look no further. the 2006-2007 WRX STi sedan comes with and is designed with a 2.5 inch exhaust OEM. Most aftermarket exhaust are 3.0 inches and will rub the driveshaft. I had to have a hanger cut and extended to solve the clearance issues. Other than that it went on beautifully. This is my second exhaust for my 2007 limited edition WRX STi. I originally purchased the Greddy, and the internal baffles failed causing a horrible sound. Hopefully this lasts as long (10yrs).
    Was this review helpful?
    Perrin Cat Back Exhaust 2 years ago
    5out of 5stars

    This exhaust looks and sounds great! Easy install. Quality manufacturing for a reasonable price. The tone is a deep rich sound without being too loud or obnoxious. Overall a good decision.
    Was this review helpful?
    Installed last week 4 years ago
    5out of 5stars

    So install was only a pain because one of the bolts was rusted where the catback meets the exhaust pipe. Other than that bolt though it was maybe 30 minutes of work total with 2 jack stands and a jack. Overall: SO WORTH IT. The exhaust tone is deep and sounds great! It's a little quiet though, but if you get on it you can hear it for sure! (Still not too loud though) I've heard you can make it louder by going catless on the downpipe so I may try that. The sound is SO good though. One thing I noticed (vs stock) is that if you take your foot off the gas, the car will coast way more smoothly. (which is good!) No idea on gas mileage yet, and power increases might be there? Not really sure, most my driving is spent at lower RPMs right now.
    Was this review helpful?
    Love this exhaust! 4 years ago
    4out of 5stars

    Mated this to my 3" downpipe and it sounds so mean, I constantly get compliments on how good it sounds. The brushed finish gives it a unique look, love the v-band connection as well. Give it some time to break-in, the sound changed completely from when I first installed it. It can be very quiet while cruising at low rpm, but it has the nastiest rumble when opened up. The only down side was fitment with the stock hangers- The mid pipe was contacting the drive shaft center support and making clunking noises. I ended buying a set of torque solution long mounts, clunk is gone but now the exhaust hangs pretty low. Overall I am very happy with it. The picture posted is the exhaust installed on the stock hangers, it now sits a good 1/4" lower.
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    Outstanding 5 years ago
    5out of 5stars

    A fantastic exhaust, paired with the GrimmSpeed divorced downpipe and it has a really mature sounding boxer growl without being overly loud or droning. The build quality is superb and the whole exhaust is beautiful. Very impressed.
    Was this review helpful?


    • Q: 2006 STI Diffuser Clearence  UAAC1 year ago

      Does this exhaust clear 2006 STI rear diffuser without any trimming or cutting?
      • 0 of 0 people found the following answer helpful

        A:  The muffler is larger than the oem muffler so it would depend how much room you have to work with.

        Devan M. @ RallySport Direct 1 year ago  
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    • Q: Will this fit a 2005 Forester XT?  fozzyboiii242 years ago

      Will this fit me 2005 Forester XT? Looking at the hangers it looks like it will mount properly but will it clear the rear bumper?
      • 0 of 0 people found the following answer helpful

        A:  For any fitment questions please refer to the vehicle fitment chart below or use the vehicle search filter located at the top right corner of your screen. However, because this is a more common question the answer is NO this will not fit. The positioning may be right however it will hit your bumper, no doubt.

        Tyler A. @ RallySport Direct 2 years ago  
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    • Q: 2002 Subaru WRX w/ Grimm Speed Downpipe  Padillar3 years ago

      How does the Perrin CatBack Exhaust fit on a 2002 Subaru WRX w/ Grimm Speed Downpipe. Will the fitment be perfect, or require the Perrin downpipe paired with the exhaust?
      • 0 of 0 people found the following answer helpful

        A:  Perrin designs their catback with a unique flange designed to bolt to both the smaller OEM flange and the larger aftermarket flanges, so you should have no fitment issues with your Grimmspeed Downpipe.

        Brady R @ RallySport Direct 3 years ago  
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    • Q: For 2006 wrx wagon  4 years ago

      Does this exhaust come with everything it needs to fit and bolt straight onto the stock cat on a 2006 WRX wagon? Including rubber mounts etc or just re use the stock exhaust hangers?
      • 0 of 0 people found the following answer helpful

        A:  This includes everything needed and will reuse factory hangers and other OEM parts. We do recommend purchasing a new Subaru OEM Donut gasket for the downpipe to catback flange since yours will likely be worn.

        Nick S. @ RallySport Direct 4 years ago  
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    • Q: Perrin vs Cobb  WRXalex13315 years ago

      Which of the tow catbacks has a lower rumble? Perrin or Cobb
      • 0 of 0 people found the following answer helpful

        A:  It is really personal preference, but both will be great quality! and have low rumbles. Would be best to see if you can find a video on Youtube.

        Kyle A. @ RallySport Direct 5 years ago  
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