Blk003GT

i'm in the process of putting my turbo in and there is only one bung for the pre cat 02's. so do i only need to hook one up because theres only one exhaust pipe comming off the turbo?

WhiteFoxGT

Well I assume your turbo setup does not include cats correct? The only thing the rear 02 does is make sure the cat is doin its job. Does not change fuel trims or anything. Have your tuner disable the rear 02 when its all said and done.

Blk003GT

yeah i know i don't have cats but like the down pipe only has one o2 bung is what i'm saying.

There are 2 PRECAT o2's. traditionally one o2 for each pipe. but since its a single turbo and both headers feed into the turbo and only ONE pipe comes out of the turbo. will both PRECAT o2's still need to be connected to the downpipe? i only see one bung for a PRECAT o2

Blk003GT

on the y pipe there are 2 o2's for the AFTER CAT o2's so i have those taken care of its just on the PRECAT thers only one bung do i need to get another one welded on?