hey i'm trying to figure otu where to locate the o2 sensor on my 05 5.4 gonig with long tubes, true dualed, with hi flow cats, gonna get a gryphon custom tuned at the same time, but was wondering where to put the sensors

 

Shortly after the rear O2s.

 

thanks for the reply but my truck only has 2 o2's one in the middle of each cat

 

Right, so if you have hi-flow cats installed, have those sensors mounted after the hi-flow ones.

 

ok sorry if this is a stupid question, i want to install them after the cats? i don't need to add 2 more in front of the cats?

 

Yes after the cats. Hi-flow cats installed, then O2 sensors mounted after them.

 

thanks for all the help Darren