ISR Performance MBSE Type E Catback Exhaust Subaru WRX / STI 2015-2017



ISR Performance
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ISR Performance MBSE Type E Catback Exhaust for the 2015+ Subaru WRX and STI is designed with a stainless steel 3" mid-pipe that splits to dual 2.5" pipes leading to the rear muffler. The mufflers each feature dual 3.5" tips. Our ISR Performance MBSE for the WRX is the ideal system to gain extra horse power and an aggressively deep tone that your WRX needs.


  • Stainless steel piping
  • 3” mid-pipe
  • 2.5” muffler section
  • Quad tip muffler  
  • Adapter flange for direct bolt on to factory down pipe 


1 customer has reviewed this product.

Awesome exhaust and killer price

, Aug 31, 2016
I was shopping for a new exhaust for my 2017 WRX and I wanted something local. I came across IIR they are based out of Florida. I gave them a call to see if they had any Ideas about what exhaust I should go with. I spoke to Kris and when reviewing the different types of systems I decided on a cat back. While looking on the site I came across the cat back from ISR performance when I saw that it was 500 bucks, I asked about it. Kris explained to me that they have been around making exhaust systems for Nissan and Hyundai and are now getting into the Subaru market. I told him I would like to gamble on the exhaust and I couldn't be happier. This thing sounds beast. It has a very deep sound and doesn't get raspy at high RPM. It just sounds clean, so I would say this is a great start from a company that is just now getting into Subaru. The only thing I can think of, is they give you a 2.5 to 3 inch adapter to convert the factory down pipe to the 3 inch mid pipe which is nice but they don't give you the bolts. To do that you have to use your factory spring bolts and they are not long enough, so what I did is not use the adapter and just mount it directly to my down pipe and use the exhaust gasket they give you. I do not have any exhaust leaks and I have been driving on it for over 300 miles. You will not go wrong with this exhaust, it is louder then the Q300 but quieter then ETS extreme. I will say if you are looking at the ETS axle back or the Nameless axle back they can run up to 550.00 and it is only an axle back and this is 500.00 for a cat back. ISR FTW.

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