H or X CROSSOVER?

Following Troy, I will be running same manifolds you are . So I'll have to upgrade the exhaust system. Maybe do a summit purchase together? I have an exhaust guy, he's flexible whether his "stuff" or store bought.
Thanks Steve

I don't think Summit carries the TTI kits. I am trying to figure out X vs H so I can get a price from Nigel. Definitely a bulk purchase might save us some dough!