Hi!
I would like to know where to put the wideband bung on my custom HFC.

between the downpipe and the cat....on the cat.....after the cat?

and what about the o2 sensor....where do I put it?

thanks!

 

wideband goes before the cat and there should be a O2 sensor before and after the cat.

 

so, according to your post RaysEvoX, on, for example, the AMS HFC...there are 3 bungs?!?!?! 2 for the o2 sensors (1 before and 1 after the cat) and 1 for the wideband?!?!?!

How come on all the aftermarket HFC there are only 2bungs including the one for wideband.....

 

There are 2 bungs for The factory O2 sensors. If that is the case you must get a third welded on, or shut the rear O2 off via AP and put it there if you have a test pipe. This can't be done with HFC because it would be after the cat.

 

anyways...the primary o2 sensor is on the dowpipe. So, if I go custom...I only need to add one wideband bung before the cat and one bung for the factory 02 sensor after the cat.

 

Yes that is correct. Primary o2 (stock) is on the downpipe. On the test pipe or HFC, you will need to have one bung before the cat for your wideband, and one bung after the cat for your factory rear o2.

 

Great!! thanks!!!