ordered pacesetter's now which high flow cats?
 

I have a 96 z28 and I ordered long tube headers coated AIR/EGR hook ups. I want to keep my post cat o2's and need to know which high flow cats work well with not hitting the bottom of the car. Also how do you guys usually hook up the post cat o2? will the cats come with a hole drilled?

What size extender will I need for the sensors? I got a 24" for the header bung o2, I just dont know how long the post cat one should be.