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PERRIN Cat Back Exhaust (Part Number: )
PERRIN Cat Back Exhaust (Part Number: )
PERRIN Cat Back Exhaust (Part Number: )
PERRIN Cat Back Exhaust (Part Number: )
PERRIN Cat Back Exhaust (Part Number: )
PERRIN Cat Back Exhaust (Part Number: )
PERRIN Cat Back Exhaust (Part Number: )
PERRIN Cat Back Exhaust (Part Number: )
Community Media
PERRIN Cat Back Exhaust (Part Number: )
PERRIN Cat Back Exhaust (Part Number: )
PERRIN Cat Back Exhaust
Subaru WRX/STI Sedan 2011+
Read 11 Reviews | 17 Q&As
Part # PSP-EXT-347BR
msrp: $1,350.00

In stock! Ships same day

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
  • 3.5" Slash cut exhaust tips
  • Straight through mufflers with an internal "Y" for improved high-flow capabilities
  • V-band connections
  • Adjustable Y pipe
  • Brushed stainless steel finish


    Brand: PERRIN
    Exhaust Orientation: Straight Exit
    Exhaust Weight: 52lbs
    Installation Hardware Included: Yes
    Piping Coating: No
    Piping Flex Joint: No
    Piping ID: 3.00in
    Piping Material: 304 Stainless Steel
    Piping Taper: No
    Silencer Included: No
    Tip Material: Stainless Steel
    Tip Qty: 4
    Tip Shape: Round
    Tip Size: 3.50in
    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 -



    11 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-347BR)
    PERRIN Cat Back Exhaust ( Part Number: PSP-EXT-347BR)
    Great exhaust in quality, performance, and sound 4 months ago
    5out of 5stars

    2011 Subaru Impreza WRX STI I was looking for an exhaust that wasn't too loud to annoy neighbors, but loud enough for spirited driving. This is the exhaust that fits the criteria. It has the great, deep boxer rumble we all know in love, not raspy at all. Bit of drone on acceleration, but pretty tame on highway cruising speeds. I have it coupled with an Invidia catted DP and while on the highway, the tacho reads about 100 rpm less than it did with a stock exhaust. The Y pipe arms to the mufflers are extendable and retractable, which makes it universal for 2011+ WRX/STI sedans. Overall a great exhaust
    Was this review helpful?
    Great exhaust 3 years ago
    5out of 5stars

    Definitely louder than stock, conserves a good boxer sound. I would however note there is some drone at highway cruise. Fantastic fit and finish, great boxer exhaust note.
    Was this review helpful?
    Worth every penny 4 years ago
    5out of 5stars

    This is a must have exhaust for Subaru owners. I had my mechanic install this system on my 2015 STi and all I can say! The tips on it look amazing, and the sound is incredible. It's just right for the car, especially going stage 2. I have mine paired with a Grimmspeed downpipe, and it's a killer combo. No fitment issues or leaks either according to my mechanic. I can see the pipes from under the car too making it look even more aggressive from the rear.
    Was this review helpful?
    Quality!! 4 years ago
    5out of 5stars

    Exhaust is loud and no drone inside! thumpd up.. fit perfect on my 13 sti
    Was this review helpful?
    awesome catback 4 years ago
    5out of 5stars

    installed this on my 2013 STI Limited and the sound is just great! very deep and mature sound. Kinda loud at first but absolutely less drone on the freeway at 65mph. really complimentsmy PERRIN CAI. they really work hand in hand...too bad PERRIN discontinued the down pipe it could have been perfect!!! im planning on installing COBB downpipe with stage 2 on it! Great Job PERRIN!!!
    Was this review helpful?


    • Q: Perrin Cat Back Exhaust  jasonator2 years ago

      I have a 2015 WRX CVT ...will this work and will I need a tune? I do have a Cobb V3, so do you supply the tune? Thanks
      • 0 of 0 people found the following answer helpful

        A:  Catback exhaust systems do not require tunes, and your AccessPort has OTS maps already installed.

        Chris W. @ RallySport Direct 2 years ago  
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    • Q: 2015 subaru wrx perrin exhaust rattle  seby91791594484 years ago

      Having an issue with some rattle or knocking due to the exhaust being very close the heat shield and the arms. Im using the stock hangers so I'm wondering if longer hangers would solve my problem
      • 0 of 0 people found the following answer helpful

        A:  I have this installed on a 2012 Sti sedan, with the Perrin 12mm hangers. I had the same issue. I had to reshape the rear diff heat shield to gain clearance, it's really tight clearance. No more rattle! I'm not sure about the 2015, but the heat shield was my only issue.

        Was this answer helpful?
    • Q: Exhaust question  DubyaAZ4 years ago

      Ive always had aftermarket exhaust on all my rides. I now have the 2015 wrx and the stock exhaust. The exhaust sounds pretty good the first minute u start it. Deep sound. Then it goes away haha. Overall kind of a wimpy sounding exhaust. I've been told that exhaust setups on this year car with 2.0 motor still don't have a big sound difference. So my question is, how big of a difference in sound will you get from the perrin full exhaust versus stock? Any insight helps. Thanks everyone
      • 0 of 0 people found the following answer helpful

        A:  This exhaust is not overly aggressive but it does bring out a modest tone that does open up more than the OEM exhaust under throttle. At idle it is likely to be similar to the stock volume with maybe a slight increase.

        Nick S. @ RallySport Direct 4 years ago  
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    • Q: horsepower?  james_nickerson234 years ago

      realistically how much horsepower can we expect to gain from this ??
      • 0 of 0 people found the following answer helpful

        A:  Gains will be minimal (about 10 HP or so).

        guest56ad69792a8d256e198b66b5 @
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