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Invidia Q300 Cat Back Exhaust ( Part Number:INV HS02SW1G3S)

Invidia Q300 Cat Back Exhaust - Subaru WRX/STI 2002-2007

Manufacturer Part # HS02SW1G3S


MSRP: $926.00

In stock! Ships same day
Qualifies for free shipping!


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 a beautiful 101MM polished tip, 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: 1
Tip Shape: Round
Tip Size: 101mm

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

2006 STI w/ETS rotated turbo kit
tboldt199163299 1 year ago
I did the install of this on my own. The two piece assembly made this very easy to get the pipe aligned while squeezing under my car. Exhaust came with all new gaskets and hardware. I purchased this to replace the custom made exhaust on my car (Needed something less quiet). It fitted up perfectly with my ETS rotated downpipe without issue. The tone is pleasant and made my mini monster less noticeable on the street. Being catless and having equal length headers, it still growls a bit. Once the wastegate opens, you can't hear this exhaust at all. Thank you Rally Sport Direct for the fast shipping over the last few years!

Great fit great sound
sneakybee 2 years ago
Q300 is quiet and easy to install, put the invidia bellmouth downpipe with it and all I can say is super smooth. Used two short hangers in the back and a long one in middle, If you have small children or just want to be stealthy this is the exhaust you need.

a great product
Lambro 2 years ago
This catback exhaust is great. Its not much louder then stock so neighbors wont complain. Its a very nice deep tone that doesn't drown out the car.
Verified Purchase

Great exhaust, but...
14firefighter94 2 years ago
This exhaust is awesome. It sounds great and looks great, but required a little fabricating for my application. To anyone installing this to a 2.5i Impreza, the midpipe is about 3" short. The most cost effective way I handled this was I made an extension pipe from some 2-1/4" pipe and a couple 2-1/4" flanges. Just weld everyting together and bolt the extension to the stock cat pipe and then the new exhaust will bolt in no problem. Tip: make sure to buy another set of bolts and 2 gaskets that fit the 2-1/4" flanges. Also, when buying the flanges and gaskets, make sure the bolt spacing is correct ( about 4-1/8" ). The stock cat pipe has a lip where the donut gasket fits that will need to be cut off and ground down flush to make a good seal.


Perfect except for one issue...Installed on a 2006 WRX Wagon
mahermic00028081 3 years ago
After getting this installed it sounds amazing, it's the perfect blend of rumble but not being overly loud and droning. The only issue I had (which wouldn't come into effect if you were replacing the downpipe) is the bolts provided to link the mid-pipe to the downpipe are to big and will not fit into the stock downpipe holes. The one's provided are an M10 and the hole will only fit an M8 unless you were to drill out the hole to fit an M10. This is my experience on a 2006 WRX Wagon which may differ from the Sedan downpipe holes. Just be warned that you may need to make a trip to the auto parts store for some M8 bolts and nuts if you are strictly using this for as a catback setup and not a turbo back. Amazing Product otherwise and will continue to order from you guys!

  • Q: Invidia Catted Divorced downpipe  bmscone46477 8 months ago


    Will this catback bolt up to the invidia downpipe or do I need an adapter?

    • A: This will bolt up directly to the Invidia downpipe!

      Megan L. 7 months ago
  • Q: Silencer (2005 WRX Sti)  JoshSti 10 months ago


    The Description stated the Silencer, gasket, etc. Included, but the Specification said NO, which is it? With Silencer or No Silencer? Please advise.

    • A: The Q300 won't include a silencer. The pictured hardware is what will be received with the exhaust.

      Evan M. 10 months ago
  • Q: q300 invidia 2002-2007 wrx sti  ED 11 months ago


    will this fit on 2004 forester xt?

    • A: No, this exhaust will not be a direct fit on a Forester XT.

      Evan M. 11 months ago
  • Q: Fitment  mark_loredo 4 years ago


    Will this bolt up to a COBB DP?

    • A: This will mate up the Cobb DP. We recommend using the OEM donut gasket along with the Grimmspeed adapter for the best seal.

      guest57853c642a8d25b5018c44a7 4 years ago
  • Q: Mating (lol)  IhasSTi 4 years ago


    Will this mate up with the perrin downpipe? Assuming it will.... I would just like to make sure before spending the money.

    • A: This will mate up to Perrin's downpipe with no issue :)

      Brady R. 4 years ago
    • A: This will mate up to Perrin's downpipe with no issue :)

      Brady R. 4 years ago