2000CX

so i have an 00 cx hatch and i am going to install the dc 4-1 header...i want to retain use of the secondary o2 so what cat can i use? ex...si? or should i go with a high flow universal and add a bung to it?

PLUG: if anyone has a stock cat they are selling that will work let me know.

HXMan

I would just add a bung....

2000CX

do ex/si cat even have a bung on them already? i know some of them are obdII right? like 99-00 should be...i think

freakin_eLRoD

Yes the 96-00 civic ex/si cats have o2 bungs on them.