I keep reading threads about how everyone is stripping the O2 sensors when they install a header.

I had no problem when I put on my MMW. I used a pipe wrench to loosen the sensors and they screwed right into the new header/S-pipe no problem.

I just dont get it....

 

its a soft metal and hard to put in properly and in my case i didnt notice the megan header i had since it was used had messed up threads and mush went the threads on my o2 lol but its all good i fixed it now didnt cost a dime

 

soft metal and some are cross threaded from factory