Hello guys I have another question hopefully i don't feel like a noob after I see the replies to this lol... So I was able to find a GReddy TI (not Ti-C) to buy and it's being shipped right now but supposably there isn't a 02 bung on the full titanium catback do I have to add one for the rear 02 ( if so wud welding non ti with ti make it hard) or will I be fine? I've heard about sparkplug and cel fix but do those work for rear 02 also??? Any info wud help guys thnx for ur time

 

you have an evo 9, the o2 sensor bung is located in the catalytic converter. if you are running stock cat then dont bother with getting a bung welded, but if you run a high flow cat/test pipe i would just have a bung welding onto that pipe and leave the catback the way it is

 

Ya I got a IX sweet , Im gonna guess the 8's were the one with a rear 02 then, so I'm just gonna have 2 bungs one for WB on dp and one for the 02 in the test pipe sweet I'm set. thnx for the help bro really appreciate it