Dan S

I've got an 07 3.0, and am doing an at home nitrous kit for the fusion. I'll be adding 75-90hp with spray (potentially). Now, my question lies as to whether or not I should buy the High flow cats and a cat back system, or if it would prove to be wasteful. Also, does steeda make a tune that can be used with nitrous? I understand that there is not much use in high flow cats and exhaust unless looking for sound, but with the addition on No2, would it become more effective?