Invidia Q300 Cat Back Exhaust

Manufacturer Part # HS08STIG3S


MSRP: $1,378.00

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Turbo-Back Exhaust Stainless Steel Tip System 08-14 STI Hatchback ( Part Number:RSD SSTBS08-14HTH)
Turbo-Back Exhaust Stainless Steel Tip System 08-14 STI Hatchback
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If you are looking for a great way to squeeze a little extra performance from your vehicle, then you will be pleased with the Invidia Q300 Cat Back Exhaust System. There are several performance attributes that makes this an excellent upgrade. This exhaust system has been made from 304 stainless steel and features 76MM piping. The exhaust has also been designed with minimal bends to reduce the amount of turbulence during acceleration, allowing the engine to exhale the exhaust gasses with less restrictions. This means you will have improvements in throttle response, along with increases in both horsepower and torque. 

This exhaust will come with quad polished tips, and the exhaust hangers are welded onto the stock location of the pipes so you don't have to perform further modifications.

New gaskets and hardware, will be included to make this exhaust system ready for installation.


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Brand: Invidia
Exhaust Orientation: Straight Exit
Installation Hardware Included: Yes
Piping Coating: No
Piping Flex Joint: Yes
Piping ID: 76mm
Piping Material: 304 Stainless Steel
Piping Taper: No
Silencer Included: No
Tip Material: Stainless Steel
Tip Qty: 4
Tip Shape: Round
Tip Size: 101mm
Mfgr. Warranty: 1 Year
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.


Verified Purchase

Invidia Q300 Cat Back Exhaust
TJB1013 9 months ago
Exhaust arrived 2 days after ordering. Install was very easy, about 30 min. with all hardware included. Great fit and finish. Perfect sound! Not too loud and no highway drone if installed correctly.
Verified Purchase

Great Quality Sound
306Scooby 1 year ago
Great product from start to finish. Immaculate pipes and welds, all supplied bolts/gaskets and a beautiful sound. Was not positive on how loud it would be, nice Subaru sound at normal driving but let me assure you this is not a quiet system when on the throttle. You wont regret this purchase. Installed on 2011 STI
Verified Purchase

Great Exhaust!!
findtheline00124497 2 years ago
This exhaust looks and sounds great! Even after a tough South Dakota winter the Tips polished up very nicely and the muffler still has that nice mirror finish. Great product, would highly recommend to hatchback owners looking to get the full effect of the sound of a boxer engine. This one is not aggressively loud, it sounds great for a daily driver.

2011 STi Hatchback Invidia Q300 Catback
ja.colindres42806 2 years ago
I am the type of person who rarely write reviews. However after the simple 1 hour installment and the amazing Subaru Boxer rumble that came out of those pipes, I felt like I had to write a review. I got the Cat-back exhaust and it sounds great. There isn't the drone-like sound at high speeds (around 65-80 mph) which is great because I do a lot of highway driving. It isn't EXTREMELY loud when driving through town. However it gives off a rumble during down shifts. But no matter what there should be no reason why anyone should be complaining on how loud the exhaust is because your getting exactly what you paid for which is the Subaru Boxer sound that you have been wanting from the beginning. I would totally recommend this exhaust if your just looking for a good bass like normal exhaust without attracting too much attention to yourself as well.

All around great
jriley87 2 years ago
Super easy install less than 45 minutes, did not need to buy an adapter for my stock down pipe and I have 0 exhaust leaks! Not super loud so if loud is what you want don't buy this one. Has a nice deep rumble. 2013 Wrx pro tuned on 18 psi and cat back.

  • Q: How would this fit on a 2013 WRX Hatch?  JSTORWRX 3 months ago


    Also, Do you ship to hawaii?

    • A: Yes, this is a good fit for the 2013 WRX and we do ship to Hawaii.

      Evan M. 3 months ago
  • Q: Exhaust  TChan 4 months ago


    Would this mate up to my catless invidia down pipe?? Cheers!!

    • A: This will mate directly up to the Invidia catless downpipe.

      Tyler.G 4 months ago
  • Q: O2 sensor  Cv 6 months ago


    I bought the q300 for my 12 wrx hatch and was wonder if the invidia cat comes with a slot for the o2 sensor. From what I have it doesnt.

    • A: The O2 Sensor Bung is located in the downpipe.

      Brady R 6 months ago
  • Q: clarification only  ryanrm_21263197 7 months ago


    I just bought the Q300 cat back for my 2011 wax hatch. Would this be a direct replacement for my exhaust or are there any necessary parts I need to complete the swap? Is this also CARB certified? Thanks!

    • A: For use with the OEM Downpipe, and adapter like Part #: GRM 077046 is recommended. The exhaust is not CARB certified.

      Evan M. 7 months ago
  • Q: 2014 WRX Hatch  Aaron 8 months ago


    Purchased used Q300. What sizes are the 2 different bolts? And what brand/kind gasket would be best?

    • A: Any of the gaskets that we carry are a great quality and typically the Grimmspeed gaskets tend to be the popular choice. We are unable to confirm the size of the bolts and would just recommend going to your local hardware store and finding a bolt that fits correctly.

      Tyler.G 8 months ago
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