So i just put on new aftermarket header i had just purchased last night. After installation i started it up to make sure things were good... But seriously within the first 10 seconds of being on the headers get so hot you cant even touch them. Now i did not have the 02 sensor in but i just really doubt it would cause it to do that within that short of a time period. Also it started to smoke, but im guessing that one would be normal because of grease and such touching it before hand. IF it is the 02 sensor i will just replace it and be happy but the old stock headers before never did this. I would love help with this because i really would not like my teggy to die.