Invidia Q300 Cat Back Exhaust

Part #: INV HS11STIG3S
( 29 reviews )


MSRP: $1,378.00


Free Shipping

Free Shipping offer applies to orders over $200.00 to the 48 states via UPS Ground or USPS Priority.
Offer Excludes shipments to Alaska, Hawaii and Military Boxes. Items that are too large to ship via UPS or USPS are excluded from this offer.
Please read more on our full shipping policy HERE

   In Stock: Ships the Same Day
Return Policy | Shipping



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
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.


Subaru Impreza
WRX STI Limited Sedan 2011, 2012, 2013, 2014WRX STI Sedan 2011, 2012, 2013, 2014WRX Limited Sedan 2011, 2012, 2013, 2014WRX Sedan 2011, 2012, 2013, 2014WRX Premium Sedan 2011, 2012, 2013, 2014

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.

REVIEWS ( 29 )



Some things you should know before buying...
Hawkeye 8 days 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 6 months 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.

Just love it!
alexr4078116 11 months ago
Perfect sound! Not super loud, but it rumbles! Perfect fitment and easy install. Installed in under 30 minutes.

Yes it sounds amazing. That rumble and deep sound. No drone.
Luis Pelaez 11 months ago
What can I say. I already uploaded an image. This exhaust is a perfect fit on my STI 13. It sure makes heads turn. And it holds up a stance. I'm happy with my project so far and thanks to RSD I keep progressing. Thank you.
Verified Purchase
Perfect sound
Vaughn 1 year ago
I've had the SPT factory cat-back on my 13 sti for about a year and finally had enough. The SPT was unbearable on the highway because of the way it drones. Once I upgraded to the Q300 I have a great look and the sound level inside the car is much better. Honestly, this is how the car should come from the factory.


  • AnswerQ: Fitment with Invidia Catless DP.  Luis Pelaez 12 months 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. 12 months ago

  • AnswerQ: replacement gaskets  dhaggerty6715217136 1 year 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. 1 year ago

  • AnswerQ: Stock down pipe to mid pipe  c.sanborn9017956 1 year 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. 1 year ago

  • AnswerQ: Hardware   captain_boost 1 year ago

    What size are the bolts that come with this? I lost mine

    • A: M10 x 1.25 Bolt & Nuts x 6 M8 x 1.25 Bolt & Nuts x 2

      Zach G. 1 year ago

  • AnswerQ: Oem downpipe 14 WRX Sedan  captain_boost 1 year ago

    What is needed to run this with a stock downpipe

    • A: This downpipe can be used with the stock downpipe and donut gasket and an adapter is not necessary, but adapter # GRM 077046 will make the installation a little easier.

      Zach G. 1 year ago