headers are installed but need to know where the rear o2 sensors plug into

the 2003 nissan maxima has 4 o2 sensors

2 o2 sensors connect to the headers themselves

the other 2 connect to the b-pipe i guess
is this correct?

where is the b-pipe?

and do i have to modify the b-pipe to get the o2 sensors in?

 

You have to install 2 oxygen sensor bungs after the cat convertor and rewire the two oxygen sensors to the back.

 

do i have to weld the 02 sensor ports into the b pipe

will i have to do some welding?


thanks for the help i am working on them tonight

 

yep.You have to weld o2 bungs into the b-pipe after the cat. THis acts kinda of like the pre-cats so it works for most people.

 

You dont need to weld anything..just get an o2 simulator
http://o2simulator.com/24803.html

 

Yeah F all those O2 sensors, it is overkill and makes modding a b!tch. Can't have that.

 

The simulators work, but relocating the sensors isn't all that hard. If you're getting a shop to do the header install, then they'll usually relocate the sensors for free or cheap. If you're doing your own exhaust work, then you should know how to relocate the sensors yourself.