Invidia Gemini R400 Quad Tip Cat-Back Exhaust

2015-2020 Subaru WRX & STI

$1,159.20 - $1,249.50



Add a powerful, mean rumble to your Subaru WRX or STI build along with a whole new look with Invidia’s R400 cat-back exhaust system!
Reset Configuration
Titanium Tips
Stainless Tips


SubiSpeed 2015+ WRX Video

SubiSpeed 2015+ STI Video

  • Mean, aggressive exhaust not with quad-tip look
  • Complete Invidia Cat-Back for WRX and STI
  • Throaty, raspy roar with downshift pop
  • Drop-in replacement for stock cat-back system
  • Backed by a 1-year limited warranty
  • Piping Diameter: 76mm
  • Tip Diameter: 101mm
  • Tip Material: Polished or Titanium
  • Piping Material: 304 Stainless Steel

Provides your WRX or STI with a Vicious Sound and Great, New Look

Your 2015-2020 Subaru WRX or STI may be a powerful street and track machine off the showroom floor, but the factory cat-back sure doesn’t let you or your competition know it. Invidia’s Gemini R400 Cat-Back for 2015-2020 WRX and STIs adds a brutal, aggressive exhaust note to your wicked Subaru build that is sure to turn some heads on the street, autocross course, or drag strip. The Invidia Gemini R400 replaces your Subie’s quiet chambered mufflers with quad straight-through designs that let your track-ready WRX or STI sing at full volume without restrictions. Best of all, the Gemini R400 comes with a choice of tip finish so that you change up your WRX or STI’s looks while getting a whole new sound.

Smooth-Flowing, 76mm Tubing with 304 Stainless Steel Construction

Invidia’s R400 Gemini Cat-Back changes up your Subie’s looks and feel in a high-quality package. Each system is made out of 76mm, mandrel-bent tubing that provides smooth exhaust outflow to help support other power-adders and custom tuning. The system is manufactured entirely out of SUS304 stainless steel with a gorgeous polished finish that will make your 2015-2020 WRX or STI look classy at your local meet or at the track. The four angled tips are each 101mm diameter and are available in your choice of standard polished 304 stainless steel, blued titanium, or black finishes so that you can match your WRX or STI’s styling theme or paint color. The Invidia R400 cat-back installs right into place of your Subaru’s stock exhaust without the need for any cutting or trimming. Invidia backs their R400 Gemini System with a 1-year limited warranty.

  • 2015-2020 Subaru WRX
  • 2015-2020 Subaru STI

Check local noise ordinances: this cat-back system is loud enough that it may violate local noise ordinances. Please check local guidelines on noise levels before ordering.

9 customer reviews

Average rating
(based on 9 reviews)
Ease of Installation
Fit / Quality
Overall Satisfaction
  1. LOVE IT

    By OZZY July 4, 2019

    Easy installation, fitment was great. brought my STI to love love the sound and shipping speed was surprisingly fast. only slight difficulty was getting the exhaust to line up center but nothing too dificult. Most definitely recommend this product.

  2. Great sound, brings out rumble. Quality control? not so much...

    By Anthony June 22, 2019

    Let me start by saying this, the R400 is a perfect exhaust for somebody that wants that deep rumble, not terribly loud, but just enough to give you a good smile when going through a tunnel or rev-match downshifting. However, my exhaust arrived with the box pretty damaged, the mid pipe flange was hanging out of a hole in the box. I wish quality control on these exhausts were a little better. The welds are next to terrible, and no matter the hanger, zip ties, or man-handling, I could not get this exhaust to sit where I wanted, evenly spaced and sitting flush with the bumper. It got to the point where it had burnt some of the plastic on my bumper unfortunately. Maybe this is just one in a million from them, i've had multiple invidia exhausts for different cars, always loved them and their quality, just wish it stayed consistent... I am happy overall, just wish QC was a little better.

  3. Wake your Subie up

    By Erick November 16, 2018

    This upgrade not only is super easy to install but also looks and sounds amazing!!! You can totally tell the quality in which is made from a mile away. I was able to install it by myself in my garage with jack and jack stands. The deep rumble brings a big o’l smile to my face. This must be the most beautiful sounding exhaust I’ve owned. The box came broken but didn’t notice nothing missing, Quick delivery though . I did miss seeing the laffy taffy Subispeed.


    By Steve U. September 22, 2018

    I have a 2018 WRX STI Type RA. And just installed the exhaust. It took longer jacking the car off the ground then the installation. I used the adapter which really assures a great seal. The revs are a bit snappier along with a bit more torque and a slight rasp which is cool. I have the stock down pipe and you can hear a slight turbo spool now. No drone sound to talk about. The cabin noise is a tad load but it drowns out the tire growl on the highway. lol Its definitely a nice quality piece. When you're in the pedal the car can be heard from blocks away and no need to beep the horn at those suspecting lane changers you might come across. I would definitely recommend this pipe.Once car was on stands it took all of 30 minutes to remove and install new pipe.

  5. Wrong Attach flange

    By Tom July 31, 2018

    The Exhaust installation was so easy on this system until it came to the attachment to the Cat Flange. On my 2018 STI, the flange that is on the CAT pipe is a conical where the flange on the exhaust is a flat. All Invidia needs to do is make this a conicle flange and it will fit both flat and conicle CAT pipes.

  6. Best Exhaust For The Price

    By Stephen May 5, 2018

    Installed SS tips on my stock 2017 WRX. Great rumble on cold start, pops on up shifts, and no drone cruising at highway speeds. Install is easy (1-2 hours), just have to play with tips to get them perfectly centered. SS tips look awesome definitely worth the wait and extra money.

  7. Clean fit, looks good

    By Ranzumze February 28, 2018

    Before install, checked with My Subaru dealer to make sure it was not going to void the warranty. They not only allowed this on a car with a full warranty, they even installed it for me. Has a deeper tone to it up through the gears, but not much louder than stock when at an idle. Much cleaner than the OEM exhaust, seems to breathe better, stainless steel will keep it in shape much longer, totally bolt on, very clean install

  8. Worth the wait

    By Mike August 6, 2017

    Ordered the SS tips when they where on back order knowing I would have to wait, thought it would be months but with in 20 days my order shipped. Installed was pretty easy, only issue was with figuring out the grim speed stock dp to cat back adapter. Quality is amazing and welds are clean, once you start your car it really comes to life compare to stock. Can't wait to add a dp to really open up the exhaust more.


    By MAU. STI May 4, 2017

    Overall easy install, had to play a bit with it so the tips were centered but nothing crazy... Once you start the engine HOLLY [email protected]#& this thing is crazy you will fall in love with your car once again... Totally recommend this product

Write Your Own Review

Only registered users can write reviews. Please, log in or register

Upload images for this product