Invidia Q300 Rolled Polished 4 tip Catback Exhaust | 2015-2018 Subaru WRX / STI (HS15STIG3S)


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2015-2018 Subaru WRX / STI Invidia Q300 Rolled Polished 4 Tip Catback Exhaust

Invidia produces high performance parts for today's hottest cars. Invidia knows that automotive enthusiasts are always looking for ways to extract more power from their engines and improve the driving experience. Using only the highest quality materials Invidia manufactures components that improve performance while remaining stylish. Invidia manufactures their exhaust systems specifically for each application to guarantee precise fitment and power gains. Invidia has applied their knowledge of automotive performance to a myriad of makes and models constantly refining and improving their product and design process. Invidia offers several exhaust system product lines to meet the expectations of nearly any automotive enthusiast.

The flat bottom shaped muffler design results in improved high speed aerodynamic performance. The muffler inside contains continuous piping design and use of Advantex material that results in an excellent free-flow exhaust with optimized back pressure, giving greater horsepower, torque gains and a rich deep sporty sound.


  • Pipe Diam: 76mm
  • Tip Dia:110mm
  • Made of high quality SUS304 stainless steel
  • CNC machined flanges
  • Improved high speed aerodynamic performance
  • Mandrel bent stainless steel piping for maximum exhaust flow and reduced back pressure
  • Robot TIG welding
  • Greater horsepower and torque gains
  • Pictures may vary


  • 2015-2018 Subaru WRX
  • 2015-2018 Subaru WRX STI

What's in the box?

  • Invidia Q300 Rolled Polished 4 tip Catback Exhaust

Customer Reviews

Based on 16 reviews
Awesome for my 2020 WRX

Super glad I went with this catback! I have a stock downpipe and the install on my 2020 WRX was easy (make sure to grab the grimmspeed downpipe to 3in cat back adapter for sealing the system). This is how the WRX should have sounded from the factory; deep boxer rumble without being obnoxiously loud and has zero drone. Some might say this is one of the quieter catbacks, but believe me, it sounds great when driving hard and going WOT.

Rjlan H.

This catback is quality, the welds, fitment and sound. Its fantastic, I have a grimmspeed catted Jpipe and the sound is just right. Not too loud and not quiet. When you send it, sounds amazing.


So I ordered this product on a Sunday evening. It arrived with free shipping Wednesday afternoon, and I had it installed by Wednesday evening. If you're looking for an exhaust with almost no drone that isn't obnoxious, the q300 is the way to go. Fitment on my 2019 STI was absolutely perfect. The sound is incredible, and I can't wait to drive the car more. I'm blown away by MAP's customer service. The product was initially listed as fitting only 2015-2018 STIs so I inquired with them and they confirmed that it does indeed fit the 2019-2021 as well. (Which it should) I still can't believe the exhaust arrived so quickly, WITH FREE SHIPPING. I couldn't be happier. Thanks MAP! (Also, this exhaust was sold out on every other Subaru store except for MAP)

Jon R.
Invidia Q300 is just perfect

I had this on my 2014 WRX and loved it. So I got it for my new 21 STi and it’s perfect! Conner at MAperformance was absolutely fantastic…will definitely be a part of future orders. Fast shipping and it was in stock!!

How the WRX should sound

I just installed my parts today. MAP catted Jpipe, Perrin turbo sump restrictor, and this Q300 catback. After flashing an OTS stage 2 tune from the accessport, I'll say that this is how the WRX should be stock. It really drives and sounds like a true sport sedan. But for this catback. The quality is top notch. The install was simple even on ramps sliding around on my back. The sound is perfect. Less noticeable than stock during easy driving. Sounds "propper" when you put your foot down. The sound is really, really good. If you want the car to sound like it should have come stock, this is your part. If you want to wake the neighbors, look elsewhere.