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
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.


Verified Purchase

Invidia Q300 Cat Back Exhaust
TJB1013 1 year 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 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.

Sounds and Looks great
2011wrxSWPhatch 3 years ago
Easy install. Looks Great. Mine is mated with the Invidia Catted DWG DP. Does hang a tad lower than the stock exhaust, because of the larger diameter piping, for you guys that are lowered. It does DRONE, especially on decel between 3k-1500rpm, like A LOT. The amount of bass drone might be unbearable to some. Sounds great on acceleration and WOT. Downshift Rev Matching sounds beautiful nasty, giving a throaty deep gurgling sound. Also can hear slight turbo spool sound.

  • Q: Quiet But Throaty Exhausts   Snowhunter 5 months ago


    I used to have an Integra with a DC Sport header and Greddy catback. I loved that sound - quiet idle and highway, but a deep throaty response under power with no tinny or buzz sounds. It sounds like this Q300 might give my overly quiet 2014 STI a similar sound. I like the sound of the 2016 STI, mine almost sounds like a base impreza. I would like something just a touch louder than the 2016 stock sound. Is the Q300 the best choice? Are there any other products that I should consider?

    • A: The Q300 will offer a deep sound quality but won't be as raspy as the N1 model because of the larger muffler. The Q300 is a great product for those who want to change up the sound to a deeper sound but still pretty responsive and plenty of sound.

      Tyler A. 5 months ago
    • A: Any other recommemdations?

      Snowhunter 5 months ago
  • Q: Exhaust  TChan 11 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. 11 months ago
  • Q: 2014 WRX Hatch  Aaron 1 year 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. 1 year ago
  • Q: Gaskets  raulb5006107 2 years ago


    I have a 2014 wrx hatchback. What gasket should I use when installing this catback to my stock downpipe?

    • A: Using the donut gasket and Grimmspeed's OEM downpipe to 3 catback gasket would be the best fit and finish.

      Nick S. 2 years ago
  • Q: Will it fit?  coloRADo 3 years ago


    I have an 09 hatch. I know this won't fit unless I do modifications to the rear diffuser. Do you know if any other modifications will be needed?

    • A: We have not tried to install this on a 2009 model and we do not know what modifications would be required to make it fit.

      Zach G. 3 years ago
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