haha me likey...i think ima do this, but since i have a post cat o2, i know i have to do the non fouler mod, but if i decided to run true duals, and i left the o2 in the one side, will my pcm be able to detect the difference in flow? if so would moving the 02 closer to the block help?

 

no... as far as possible. o2 sensors dont detect flow they detect o2 saturation. just pick a side or run an H pipe close to the end

 

ok. what about the pre cat 02? wouldnt that give me a f***ed up a/f ratio, if i switched to true duals?

 

no.

heres how it works...air/fuel goes into the head...BOOM...exhaust comes out and flows down the pipe...hits the first o2 sensor...this tells the computer how much oxygen is left in the exhaust...too little--less fuel...too much--more fuel. the second o2 sensor just makes sure the cat is working.

as long as you dont have a "head specific" problem, then the exhaust o2 saturation will be the same on both sides. that just means that you can put it wherever is most convenient for you. my suggestion would be after the bend from the manifold/header.

 

 

not sure if it was mentioned, didn't see it if it was, but what's the pre-cat pipe diameter?

 

2"OD on mine

 

cool, mine should be the same then, same year/motor

also is that tip like the one they have at Advanced or the Zone, that has slashcut ends?, sure looks like it

 

yeah...couple bucks at local parts store. its called a "turndown"

 

i meant the chrome tip you used as a Y pipe