What high flow cat should i get if i have a jdm itr 4-1 2.5in header.

 

there is basically no REAL high flow cat. All cats must meet a certain emissions requirement to be passed. All cats are going to be restrictive, dont pay $50 or $100 for a "high flow cat", just get a normal one, or get a straight pipe "test pipe".

 

check mufflertech here: http://www.mufflertech.com/htmlsite/...&pstring=17,19

 

a resonated test pipe would be fine. some thing cheap to fill the gap, and not be raspy.

 

make sure you dont have an existing sensor in your current cat, if you do and get a straight pipe or resonator, you will cause a check engine light... i believe only OBD II has the O2 sensor also in the cat, I could be wrong tho

 

how would i be able to get rid of the second o2? i am doing obd2 to obd1 conversion, what else is needed because i wan to get a test pipe without throwwing a code.

 

the obd II to obd I conversion will take care of the sensor. So as long as youre running OBD I you shouldnt throw a code

 

Or you could buy an o2 simulator. I bought one for my car before i found out the obd2 jdm itr dont have a second o2 sensor, and am willing to sell, it was never used.

 

how much you want for it?

 

so all i have to do is unplug it?