Subaru's have two o2 sensors. one on the up pipe, and one on the down pipe near the cat.

up pipe is narrow band while down pipe is wide band.

 

subaru's have 4, or 5 o2 sensors..

get your ---- straight kain

 

I have mine in the same place as the primary o2 sensor goes on my si. So far i have had no problems and i have not installed a copper heat shrink. Its around 18 inches away and at the 12 oclock position. I have been running it for about 5 months and in 100 degree weather.

 

Oh yeah, it the one that comes with the lc1 kit

 

I've had mine for 4 years...