I might be getting pacesetter long tubes and tsp off road y pipe. Do I need new 02 sensors? I tried looking for bosch 1311s, but can't find any on a yahoo search. If I need em, anybody know where to look?

 

You don't need new ones. You can reuse your stock sensors with extensions. If you do need to replace the stockers, I'd go with factory stock replacements (ACDelco). I've seen too many problems with the Bosch sensors.

 

do what sspdmn said, plus you will need 02 simulators because your cats are gone (which is a good thing).

 

Forget the sims, just get them tuned out.