Ok, need some opinions here. I'm in the middle of a build and decided to change exhaust while I'm at it. My question is whether or not to try to clean the O2 sensors before putting them in the new exhaust. Don't know if I might clog them up trying to clean them or if it's better to just leave well enough alone. Thanks for your thoughts.

 

I guess you could wire brush them off and blow them of with some air. I dunno they are in you car for 100k miles without messing with them.