So I just got my Invidia Catless DP in but still waiting on my SPT exhaust which I nor the dealership have any idea when it is going to come in. I want to put in my DP bad but if I do that will I need a tune for it? Would it be better to just wait for the SPT to come in and put it all on at once then run a Stage 2 Map? Its sitting in my garage and I want it on haha... Thanks!