Invidia Q300 Cat Back Exhaust Titanium Tip

Manufacturer Part # HS15STIG3T


MSRP: $1,467.00

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Turbo-Back Exhaust Titanium Tip System 15+ WRX STI ( Part Number:RSD TTBS15STI)
Turbo-Back Exhaust Titanium Tip System 15+ WRX STI
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The Invidia Q300 Cat Back Exhaust System is one of the more popular exhaust systems due to the performance, and price. This exhaust features high quality SUS304 fabrication with CNC-machined flanges, and manufactured with a high polished finish. This exhaust also features mandrel-bent stainless steel piping for maximum exhaust flow, and reduced back pressure. 

Please note that 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: Titanium
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.



Decent product, but hiccups after 2 years of ownership
Alex 26 days ago
I've owned the catback system for over two years on my 2015 forester XT. Fitting was made to the rear bumper in order for the tips to fit. Looks badass, sounds pretty good even though a little loud when going uphill, but nothing unbeareable. Shipping was good. The product would've had 5 stars everywhere if it were not for a piece of 12 foot fiberglass coming out of the exhaust tips.. I had to pull out most of the fiberglass as the tips were stuffed with it. It's quite an unpleasant experience when you spend 1K on a catback, you expect it to be of quality. Perhaps, someone could have a solution?

Edison Chan 5 months ago
"It's fxxking lit!" --Thomas Edison

Verified Purchase

16 STI
Flowerbomb 5 months ago
Bought this for a 2016 Subaru STI. Super easy install. Has a nice mellow deep sound; not loud or overwhelming. Packaging box sure did take a beating, but nothing damage. Overall happy with the product. =]
Verified Purchase

Q300 16 WRX
slim 9 months ago
For those looking for a subtle sound, pick this exhaust up. Almost zero drone but an enjoyable deep mellow tone (more quieter than my stock exhaust on cold start). Even at WOT it's not super obvious that you're punch it. Also running the cobb dp without a resonator on my 16 wrx 6mt. Exhaust is PERFECT!
Verified Purchase

Looks beautiful, but super quiet
Disillusions 10 months ago
As many have said, this cat-back is incredibly quiet. So much so, that if you didn't know it was on, you'd swear it was stock. When idling, the sound is very deep; but, get on the throttle and it doesn't go much beyond that. Personally, I can barely hear it when I'm driving; but, I know that will change with the addition of a downpipe. So, if a loud exhaust is what you're after, then this is likely not the setup for you. With that being said, it's perfect for people who are worried about attracting attention, or waking their neighbors. The fitment was perfect, and it looks absolutely incredible on the car. I'd definitely recommend it to anybody looking to buy an exhaust for their 15+.

  • Q: Invidia Q300 Exhaust  David 4 months ago


    Does the Invidia Q300 Cat Back connect straight to the Invidia Catless Downpipe for the 2015 WRX or do I need to purchase another part?

    • A: This exhaust is designed to mate up with a 3 inch down pipe on the 15+ WRX.

      Jared A. 4 months ago
  • Q: Installation  Edison Chan 6 months ago


    does this item included everything I need for installation? Any additional items I should purchase at the same time?

    • A: This will include everything to install unless you are pairing with an OEM down pipe an adapter will be required.

      Jared A. 6 months ago
  • Q: Adapter  Edison Chan 6 months ago


    Will the adapter be included in this item?

    • A: The adapter is not included with this kit.

      Tyler G. 6 months ago
  • Q: Invidia titanium cat back exhaust   Hiram23 8 months ago


    I have a 2016 subaru wrx sti, what else would I Need to order if I get the invidia q300 titanium tip catback exhaust? (adapters etc) and will I need to tune my car after the install? Also I live Montreal Québec Canada will there be extra charges once it arrives at my house? thanks Peter

    • A: You will need an adapter to have it mate to the OEM down pipe and no tune is required for any catback exhaust. There could be additional fees for packages going internationally.

      Chris W. 8 months ago
  • Q: Comparison  73rian514 8 months ago


    Between this cat back and the HKS Hi Power, which would you say has the deepest tone?

    • A: Both are very similar exhaust systems and it is always good to watch videos to get an idea of the sounds but I would probably say the HKS Hi Power has a deeper tone.

      Tyler G. 8 months ago
Subaru WRX
Base 2015, 2016, 2017Limited 2015, 2016, 2017Premium 2015, 2016, 2017
Subaru WRX STI
Base 2015, 2016, 2017Launch Edition 2015Limited 2015, 2016, 2017Series.HyperBlue 2016