MAP WRX Catted Downpipe Rev 4 | 2015-2021 Subaru WRX MT (WRX-4G-DPC-REV4)

This works so well with my MAP header and Borla cat back. Love the performance from it as well.

I am extremely impressed with the quality and fitment of the MAP j-pipe. My boost builds much quicker and holds higher, my tone is more aggressive and deep, and my only question is why I didn't make this purchase sooner. No CEL thanks to the GESI cat. This is a phenomenal piece of hardware!

If you’re on the fence of getting this DP
Just do yourself a favor and get it. The welds are high quality, the fitment was perfect it made installing an absolute breeze. I got lucky and my turbo studs and bolts came off easily with some overnight PB blaster. I loved how it came with all the hardware you need to install.
Absolutely love how it sounds! Has a nice growl when you take off and you can hear the turbo better.

I personally didn’t have any fitment issues. Better yet I don’t even have a CEL either! Couldn’t be happier.

Fit great!

Got this a few months back for my 16' WRX and think I have a good feel at this point. I had to replace an old catted ETS that kept throwing a P0137 that prevented me from registering after I went stock to take care of some of that high end power and sound I lost. This does much better than my original pipe, but I do get an occasional P0420 that I don't think I can do anything about, and at this point, it is what it is. Feels like I got most of the power back from that terrible stock pipe, but I notice it's not as loud, which is probably a good thing at my age. You can definitely feel the difference with the more pronounced cat, but the restrictions are much less. Overall it feels close to what I had before, but feels like I'm missing a little bit of the power, although it could just be in my head or maybe I need a re-tune, which my tuner said was unnecessary. For the price I would recommend given the DP options we have when you can't tune any emission codes out created from the DP. Shipping was quick and MAP is always a go to when looking for new parts as they have some of the best customer service and prices around.