For you guys who have switched over to a single 3" exhaust on the 6.0 did you just tune out the o2 sensors after the cats?

 

also did you notice gains.seems like you would, but what did you notice?

 

i went single 3"... but i went with the ebay longtubes that have the y-pipe into a single 3" so it kept my stock o2's... i did notice a gain, but then again i also added longtubes. if you arent going to or dont want to tune, just make your y-pipe separated far enough back to keep both o2's before merging the pipes into 1

 

I dont see why you just put an extra bung and put both sensors in one pipe

 

x2

peace
Hog

 

^ or that would work too.