be careful i believe that all o2 sims are illegal for the street now. has anyone tried to buy one lately. they were pulled and a big government fight insued. they are for racing use only and if a good emissions tester sees them you will fail no matter how well you pass the sniffer. all cars equiped with cats must be installed and of factory nature. you are not allowed to replace them unless you had a problem with one of yours.
i am not a tree hugger so no hate mail. the facts only. big blocks and oil burning forever

 

The 02 sims are still out there if you look. I own three extra spare sets.

 

I like America, just not CA emission laws. They will bring OBD3 to life over there in tree hug land!