2.2 liter header

I just ordered a pacesetter header for my 98 2.2 liter sonoma. Does anyone know what kind of modifaction goes into the instalation. I heard that you have to make room for the o2 sensor and redo the rest of the exhaust to keep it under the truck. Any help would be great.

should have a hookup and some heatwrap to wire up your o2 sensor...i had to shorten the pip that goes into the cat to keep it from rattling but no real major mods were needed...simple install and very much worth the money..i found it took half a sec off my quarter mle..lol not taht it was fast to begin with but you will notice a nice gain and a sweet sound...gl