Anyone have pictures of the exact location i should put the two o2 sensors on a 4-2-1 header for a 99-00si on a b16a1 ?

did a search and didnt find what i was looking for.

thanks
Walter

 

right where cylinder 1 and 4 collect, and 2 and 3 collect

 

cool thanks, anyone else with input on this? Is this how most do it?

 

im gona have to go with him on this one. i have to weld another bung in mine, and thats where they are gona be.

 

oh yeah and make sure they weld it as high as possible, i dont know about other headers but with my dc sports the bungs were almost too low, i had to make a small dent (very small) in my front crossmember so it would clear when the engine moves under power. also, mine were welded on the outsides so it would clear the rad, u dont want them sticking staraight out and hit ur radiator