Mach isn't liking WOT
 

Any common things that could cause this? It pulls hard all the way until WOT, then it starts cutting out and losing speed. It's not at a certain rpm range either, I can run 5-6k in 2nd and it runs just fine, it's only at wot for some reason, in any gear.

MAF, IAC, PCV. just check your common things, if its not them, check for vacuum leaks. if its not any of those, then its your tune.

change your plugs

There's a separate tune on the SCT for the nitrous, just I switch over to that and try? I'll check my plugs too.

Does it feel like it's misfiring or just losing power?

Both pretty much, it starts cutting out and drops speed.

Start with pulling the plugs for sure.