The Invidia R400 Gemini Single Layer Quad SS Tip Cat Back Exhaust for your Subaru WRX / STI 2015-2020 is among one of the most popular cat-back exhaust systems available as they make for an excellent upgrade over the OEM exhaust system to improve the performance and the sound. The combination of increased piping diameter along with smooth bends relieves the exhaust with restriction and turbulence under acceleration which will increase the horsepower, the torque, all while improving the throttle response and reducing the turbo lag.
Here are the key features:
- Stainless steel quad exhaust tips
- 4" Tip sizing
- 304 stainless steel materials
- 3" piping diameter
- Exhaust hangers welded on to the OEM locations to allow for a direct fitment
- New gaskets and hardware included making this exhaust system ready for the installation
Note: Are you using a stock j pipe or downpipe? If yes, the GrimmSpeed Subaru Stock DP to Aftermarket 3 in. Catback Adapter p/n 077046, is required.
From visuals to performance, the R400 outshines in both! The design is very attractive and the sound is just right! This cat back gives a nice deep tone, when accompanied by a j-pipe, that is not obnoxious, but can get loud when you need it to be! Drone is a big complaint with this cat back. I have noticed it, but it isn't a deal breaker in my opinion. Most of the time I forget it's even there (I have driven 4 hours straight)!
I had srs axleback deletes before I ordered the r400 and omg what a huge difference in sound quality. The r400 is such a mature sounding catback exhaust. Virtually no drone unless I'm going 75+
love the sound of my car now and look forward to turning it on everytime!
Shipment was super quick on exhaust. For some reason grimspeed adapter took a few more days. Invidia r400 for my 2017 wrx is the absolute best for this car. Low rumble and crackles on high revs. Got compliments on it as soon as I installed it. Very easy install by the way. Just watched a few videos on YouTube. I recomend this exhaust for anyone who wants their subie to sound the way it's supposed to. Love it!
Coming from Remark axlebacks to this catback, I was worried that this would be too quiet. I had a Q300 on my 09’ WRX and was so disappointed on how absolutely quiet it was. BUT the R400 on my 2019 STi is absolutely perfect. Deep rumble, and a few pops at higher revs. Box came a bit crunched from shipping, but nothing was damaged. It does sit closer to the inner exhaust exit edge on the driver side, which I’ve read seems to be pretty common. Overall, I’m super happy I made the jump to this Invidia, and I highly recommend anybody debating it to the same. I also HIGHLY recommend ordering from IIR, as the shipping is lightning quick!