Any gains you said? Not really to be honest with you, in my opinion it's a waste of time and money deleting the secondary cat and adding a Dp unless you plan to go full Tbe 3".
I mean think about it your removing the secondary cat that's one thing, but then your buying an aftermarket Dp which is 2.25-2.50" same as the stock,
So your spending money on a shiny SS 2.25-2.50" Dp that will give you zero gains. Only difference here is aftermarket is shiny and SS unlike stock.
If you really want to feel some gains I suggest you remove the main cat "O2 Housing" and do it right the first time and go 3" from the turbo all the way back. I am currently running and highly recommend the Turbo XS stealth back system which removes the stock o2 housing and secondary cat it's a beautiful Tig welded, SS system which retains the stock mufflers. You get the benefit of a full Tbe system without all the excess noise. Now please keep in mind this system is considered a bottleneck because you're going from 3" in from the turbo back and you're still retaining the stock mufflers which is 2.25-2.50".
This setup works great for me because I get the full benefits of a full turbo back exhaust without all the noise by retaing the stock mufflers. In the future im debating whether I'm going to get a Cat-Back exhaust to complete the 3" in exhaust system. The stealth back system is $350 and very well worth it I couldn't be more happier running this setup it's awesome!
Also the previous post mentioned smelling gas once you remove both cats. I honestly don't have that problem what so ever. I read previous threads of some forum members saying once they installed a full Tbe they smelled gas, but that only lasted for a day or two after that no more gas smell.
Also he mentioned a cell which is true once you remove the stock O2 housing, however once you get a tune that will eliminate the cell. I highly recommend you get a tune on your car as well as this is what makes the most power on this platform not the bolt on's, the bolt on's compliment the tune. I'm currently running a Prw stage 1 tune highly recommended if your a Bk1 manual tranny.
Last edited by BigBallah; 06-16-2019 at 08:30 AM.