I have a 2000 Z28, all stock except a flowmaster 80 that was all ready installed when I bought it. I buddy of mine got me some longtube headers and an uncatted y-pipe. I dont have any cats besides the factory ones on it now. Do I need to have cats to complete the set-up, or will not having them hurt the computer and/or my car. Do I need anything besides what she got me? Im new to this kind of stuff lol, i just bought the car when i got home from training, so dont butcher me to bad . Thank you for all you help.

 

You'll set the ses light, to turn it off you'll need either O2 sims, or have a shop tune out the rear o2 sensors