Invidia Q300 Cat Back Exhaust  ( Part Number:INV HS11STIG3S)

Invidia Q300 Cat Back Exhaust

Manufacturer Part # HS11STIG3S


MSRP: $1,378.00

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Turbo-Back Exhaust Stainless Steel Tip System 11-14 WRX/11+ STi Sedan ( Part Number:RSD SSTBS08-14SED)
Turbo-Back Exhaust Stainless Steel Tip System 11-14 WRX/11+ STi Sedan
As low as $1,121.44
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For a good balance of price and performance, Invidia Exhaust is constructed with high-quality SUS304 stainless steel, CNC-machined flanges, and manufactured with a polished finish. Each system features mandrel-bent stainless steel piping for maximum exhaust flow and reduced back pressure. These exhausts are engineered to produce strong mid to top-end power gains, as well as an increase in horsepower and torque.

This exhaust is for the 2011+ WRX/STI sedans ONLY. Will not fit the hatchback models.
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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: 110mm

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

Q300 on 2012 WRX
Kamran 1 year ago
Fits perfectly and sounds great. I got it installed at a local shop took them roughly 45 min to an hour. Not too loud or obnoxious it has the perfect pur! The shipment was very fast I was definitely not disappointed! I could't decide between Cobb catback or Q300 catback and I'm really happy with my decision.
Verified Purchase

Best Xmas Gift
his queen bae 1 year ago
bought this for my bf and he loves it ! Installation was quick and easy, he did it within 20 mins. the sound is amazing ! we both hear and feel the difference. I would recommend this product for sure !

Q300 on '13 sti sedan
sitiriche88933 1 year ago
Aggressive boxer sound when you floor it, same sound as stock when cruising. Perfect combination. Great look, easy to install. Currently installed with cobb intake and cobb downpipe.

Some things you should know before buying...
Hawkeye 2 years ago
Nicely built exhaust system, but the only thing people ever talk about is "drone." No one has talked about other issues with this exhaust that buyers should be aware of. Such as the fact that this Q300 system is lacking drone because it's more restrictive than other exhausts, like COBB for example, that are much more free flowing. This restriction in the muffler design causes great low end torque gains (on stage 2+ tunes) but really causes the power band to fall flat and plateau at around 5,000-7,000 RPM so there's very little top end performance. Additionally, this exhaust system is NOT very loud. It's just a little louder than stock. So for people looking for a loud and "in-your-face"exhaust, this is not the one you would want to buy. Hope this helps future buyers make the right decision.

5/5 would do again
jshclry92 2 years ago
sweet sound on my 13' wrx sedan...good tone, not obnoxiously loud either. feel like it helped my stage 1 tune most in the mid-upper rpm band to edge out a little more power.

  • Q: Difference   midnightprince304419 1 year ago


    2 part question. #1 What is the difference between this one a day the titanium one? Is there any power, weight, or sound difference? And #2 what's the difference power wise between this and the dual exhaust?

    • A: The only difference is the titanium tip version has a blue finish on the tips of the exhaust. The system is still constructed from stainless steel. Pretty much all catbacks will offer near identical power gains.

      Josh P. 1 year ago
  • Q: fitment   Dave102 1 year ago


    Hi, Will the Q300 fit Australian model wrx 2012? Being right hand drive any other requirements needed for fitment? Thanks

    • A: Unfortunately, we can only confirm fitment for USDM vehicles. Sorry for any inconvenience!

      Brady R 1 year ago
  • Q: Fitment with Invidia Catless DP.  Luis Pelaez 2 years ago


    hello at this time my 13 STI has a Invidia Catless DP with SPT exhaust and I am very interested on this q300. Will it match the Catless DP or I still need to use the adapter?

    • A: Yes, this will bolt right up to your Invidia Catless Downpipe

      Brady R. 2 years ago
  • Q: replacement gaskets  dhaggerty6715217136 3 years ago


    Where can I find replacement gaskets and bolts for the cat this cat back ?

    • A: You can use generic bolts from a local hardware store and we recommend coated or stainless steel hardware. The hardware specifications are below. M10 x 1.25 Bolt & Nuts x 6 M8 x 1.25 Bolt & Nuts x 2 The recommended replacement gasket part numbers are below. GRM 022001 Or RMF RF8006 GRM 020031 You will need two of each gasket if you want to replace all of them.

      Zach G. 3 years ago
  • Q: Stock down pipe to mid pipe  c.sanborn9017956 3 years ago


    Do I need any adapters to bolt up to stock down pipe on '13 wrx sedan?

    • A: An adapter is not necessary, but you can use your donut gasket and adapter # GRM 077046 to make for an easier install

      Brady R. 3 years ago
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