Invidia Q300 Cat Back Exhaust  ( Part Number:INV HS08SW4GT3)

Invidia Q300 Cat Back Exhaust

Manufacturer Part # HS08SW4GT3


MSRP: $1,081.00

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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 premium mufflers and a set of beautiful 101MM 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: 2
Tip Shape: Round
Tip Size: 101mm
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.



Well built, good performance
Theo K 2 years ago
Upon receiving all the welds, surface polishing etc were not poor at all on any of the components. Compliments my stage 2 2010 wrx sedan well. It isn't quiet like many posts say, one knows that it is there regardless of speed and throttle, not a drone, even up steep hills. Bolted it up to a GrimmSpeed catted DP, no adapter.
Verified Purchase

Just the touch
jmcrae31 2 years ago
Just put this on my 2010 Forester XT, wasn't wanting anything loud and wanted something stock, this hit the nail on the head, has a nice low sound but can def hear the boxer motor, took about 20 mins total to install, super easy
Verified Purchase

takeadirtnapp41997 3 years ago
did a ton of research on this exhaust before purchasing. It paid off. Fit was great, install was a big tough on ramps, but the sound is amazing.
Verified Purchase

Q300 on FXT
Teodoro 3 years ago
Installed it on my FXT along with the Invidia downpipe. Sounds awesome. Not too loud. Good choice when looking for a catback exhaust for your forester.

Best Exhaust to get!
2008WRXLINY 3 years ago
I have a 2008 wrx sedan with invidia q300 catback exhaust and invidia catted down pipe. This exhaust is by far one of the best on the market. Most subaru drivers use Invidia because of its quality and its priced at a fair price! This exhaust is loud, but not overbearing! I have been told by other people who drive subarus that my exhaust sounds great and my friend who has a blitz exhaust on his STi said my Turbo-back setup is louder than his turboback setup. I would recommend this exhaust to everyone who wants one for their sedan. I recommend dual tip over the single.

  • Q: Invidia q300 exhaust  jsschrepel10154 6 months ago


    Would I need any adapters or extra gaskets to mount the invidia q300 cat back to a stock downpipe/cat?

    • A: We highly recommend getting GRM 077046 and SUB 44022AA123

      Tyler.G 6 months ago
  • Q: Q300 midpipe Vs. N1 midpipe  waidhoyt37835 7 months ago


    Hi I'm comparing the two exhausts for my 2010 WRX. Is the midpipe the same 3" midpipe for both? Thanks.

    • A: The midpipes are very similar, but may differ slightly.

      Josh P. 7 months ago
  • Q: weight  MR_BIG 1 year ago


    whats the shipping weight including box? Thx

    • A: This item is 69 lbs.

      Nick S. 1 year ago
  • Q: 14 - 15 forester xt  Menard4605657 1 year ago


    Does this fit the new style forester xt (14-15)?

    • A: This exhaust will fit 2014-2015 Forester XT models, but the tips do not stick out as far as they should. Invidia is making a catback specifically for 2014+ FXT models, and the part number is INV HS14SFXG3S.

      Zach G. 1 year ago
  • Q: Emissions  Ironman53 2 years ago


    Will my '09 Forester pass Pa emissions after I install thIs?

    • A: All products are meant for off road use only and we cannot confirm emissions compliance.

      Nick S. 2 years ago
Subaru Impreza
WRX Sedan 2008, 2009, 2010WRX Premium Sedan 2010WRX Limited Sedan 20102.5 GT Sedan 2009, 2010
Subaru Forester
XT 2009XT Limited 2009, 2010XT Premium 2010, 2011, 2012, 2013XT Touring 2011, 2012, 2013