Maybe this is a dumb question, but here goes...If i'm using headers, were do I put the oxygen sensor?

 

There should be a fitting on one of the headers...driver's side I think...unless you bought el-cheapo headers. I have hedmen hedders, and they don't have the fitting. If you do not have the fitting, you have to have one welded on by a mechanic, or weld it on yourself, if you know how.

 

Headman headers here, Thanks