After 2 years of owning my headers I finally installed them, took 3 days Grrr, three bolts broken in the heads, had to drill and retap, one pipe had to be modified, anyway... I have EFI Live with a BlackBear program, but I gotta have tehm "update" the program for the new EFI Live software. I was able to "disable" the cat sensors in the program and uploaded it. After a few blasts it is throwing the rear O2 codes. My sensor are NOT plugged in, do they need to be? Also this is the hard part, after the pipe mod I CAN't install them into the exhaust because of the front driveshaft. When I had my 96 Impala SS one rear O2 went bad and I put simulators in there for no CEL. can I plug my "white plugged" O2's in and tie wrap them to the inner frame? Thanks for any help on this matter.

 

Post up tune

 

Here ya go. The check engine light went out? Just got home from work, going to wait til exhaust cool and I think I can get both the rear O2's installed.