Yes sir, just like every other DP on the market
There's no way to make a fully 3" downpipe on the XI models, I think you're referring to the RWD models. Our exhaust is 3.5" and uses two 2.5" pipes that mate to one 3.5" pipe.
In order to run a full 3" downpipe you'd need 3" mid pipes and there's just not enough performance gain to justify the expense.