Which o2 bung are you using for the primary sensor? The one in the header itself, or the one in the downpipe?

 

if i recall.... the header bung is for the primary o2 sensor, and the extra bung in the dp is after the cat for wideband.

 

Right now (stock) both of my sensors are in the downpipe. The zzp downpipe I bought also has two bungs(like the stock one). So after installing the header and downpipe I will have an extra bung. Trying to decide which one to plug...

 

I'm using the one on my downpipe.

 

Put your front O2 in the header.

 

you cannot possibly screw this up, unless you just leave out the primary 02 sensor. the layout of the badmab is exactly like the stocker
edit: exactly what ^ said

 

My stock manifold does NOT have a bung...both sensors are in the downpipe. It will work in either hole, just wanted to know what others were using. I'm thinking primary in header and plug first hole in dp till I get a wideband.

 

I have mine setup with my wideband in the manifold and the primary in my pre-cat downpipe bung. I'm not sure if this is the best way to do it but It works fine for me- wideband tends to jump around alot though....

 

^^^^^ Swap your wideband and primary o2 around

 

Yea my stock manifold had one so I just switch ed

 

Will this mess with my dyno tune? I paid way too much for the tune... and I'm not trying to re-tune anytime soon. LMK. Thanks!

 

I Mis understood the question..

 

Plug the one in the mani, and put wideband in the dp so it will read equal from all cylinders.