Hi everyone, Ive been doing lots of reading and found a few threads re gutted cats, but little (or confusing) info regarding cel's and o2 bung extenders etc....

Can someone with experience please tell me.....if I gut both the DP and 2nd cat, what mods (apart from a tune) are required to avoid getting cel's?

Im obviously going to be up for a hpfp, and wanting to do a sri or cai to compliment the setup, but that will pretty much be the extent of my initial mods.