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Invidia Q300 Cat Back Exhaust Stainless Tips - Subaru WRX/STI 2015+

Manufacturer Part # HS15STIG3S


MSRP: $1,378.00

In stock! Ships same day
Qualifies for free shipping!

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Turbo-Back Exhaust Stainless Steel Tip System ( Part Number:RSD SSTBSSUBWRX)
Turbo-Back Exhaust Stainless Steel Tip System - Subaru WRX 2015+
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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 3" 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 fewer restrictions. This means you will have improvements in throttle response, along with increases in both horsepower and torque. 

This exhaust will come with premium mufflers and a set of beautiful 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.

Kartboy standard exhaust hangers will not work with this exhaust.
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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

2018 Wrx with Q300
BabyWrex 5 months ago
First off ...Yes there is drone with this exhaust don’t be fooled by all the “quiet” reviews. So if you’re one who is prone to hating drone you will definitely be able to hear it. Otherwise it’s pretty tame and gets loud when you go WOT. The idea sounds much better and is more bass heavy. Firmest is awesome and the tips look huge.

Verified Purchase

Swapped my Cobb CBE for an Invidia Q300
Ben Deloria 6 months ago
I recently changed my stock VF48 turbo for a Cobb 20g. I wanted to maximize the air flow with the new turbo so I decided to purchase a Q300. This exhaust is a full 3 inch catback vs. the tapered Cobb I had on my vehicle. Another reason I purchased the Q300, is that Cobb drones around 75-80MPH with my setup. I am so happy with the purchase I made, the exhaust is quieter in my opinion and still has enough exhaust note when you decide to punch the acceleration. The welds are beautiful and the exhaust sits well. If your looking for a quiet exhaust that maximizes a full 3 inch diameter piping without breaking the bank I suggest looking into the Q300.
Verified Purchase

Sounds Better Than The Stock Stereo
Patterson 10 months ago
I wanted something that was not too loud but brings out the Boxer rumble more. The Q300 is exactly what I was looking for. It's not much louder than stock at low RPM but rumbles like an earthquake. However, if you get on the throttle, it'll remind you that it's there and ready to do work. If you don't like your stock stereo, that's okay. You can turn it off and listen to the Q300. It's sounds much better.

Verified Purchase

Invidia Q300 on 2017 STI
EightTenths 1 year ago
The Q300 has a deep burble and brings out the classic Subaru sound. I would say with the windows up it sounds about 20% louder than stock driving normally. With the windows down and going wide open throttle it has a very nice growl. In stock form I heard mostly wind and induction noises now the Q300 balances it. The best part is on the highway cruising at 75mph there is no drone with the resonator. There's a hint of exhaust note that balances out road noise from the tires and windows. Overall with the fit and finish, price and quick delivery service you can't go wrong.

Jasmin T. 1 year ago
Awesome review, thanks for sharing!
Verified Purchase

Wanted something more quiet...
Mike 1 year ago
Ordered this Q300 for my 2016 Sti equiped with a Cobb TBE. Cobb TBE was too loud and wanted something a little more quiet under load but not too quiet. Although Cobb is known to be one of the quieter combo's this Q300 CBE is just a bit quieter. Perfect! Quality is ok, personally I think the welds on the Cobb are nicer. One note: In the search for the answer on if a Q300 fits a Cobb downpipe I was told that you would either need a new donut gasket OR a grimspeed adapter set ( GrimmSpeed OEM Downpipe to 3in Cat Back Adapter MODEL # GRM 077046). This is not NEED the grimspeed adapter or it just won't fit. It will be half an inch too short to mount on the DP. I think this would be in the product description for people who want to install this on a OEM DP.

  • Q: install  snok343 6 months ago


    will this exhaust require adapter to go from stock cat to the invidia cat back exhaust

    • A: You will need part # GRM 077046 and part number #SUB 44022AA123 to pair this with the OEM downpipe.

      Jared A. 6 months ago
  • Q: Adapter for Q300  Mike 2 years ago


    Does the Q300 also need an adapter if you want to pair it with a COBB downpipe?

    • A: You will need an adapter MODEL # GRM 077046 to use the Q300 with the Cobb downpipe.

      Ben L. 2 years ago
  • Q: adapters  1stsubi 2 years ago


    does this part require any form of adapters to mount it to the stock pipe that connects with my turbo?

    • A: Yes, you will want to purchase the stock downpipe to 3" catback adapter sold by Grimmspeed.

      Nick S. 2 years ago
  • Q: Tuning necessary?  JDS3--2nd Rex 2 years ago


    Does installing this Invidia Q300 exhaust on a 2016 Subaru WRX require a tune, if the exhaust is installed alone to an otherwise stock WRX (i.e., without an aftermarket downpipe, CAI, etc.) Thanks, Jim in Greensboro, NC

    • A: A catback system by itself will not require a tune.

      Nick S. 2 years ago
  • Q: CARB legal?  subieslyder 3 years ago


    Is this exhaust CA smog legal? If not what is for the 2015 Subaru WRX. Thanks

    • A: We cannot confirm legality and you will need to check with your local safety and emissions standards regarding aftermarket products.

      Nick S. 3 years ago