If I can try to sum my understanding, so I can make a cliffnotes version of this for my own reference (I desperately want a turbo upgrade XD), I feel like I'm reading that the 300-350 hp turbos by ATP are, realistically, the ones that are truly "bolt-on", in that you don't have to do anything else to the actual mechanics of the vehicle (pump, etc.).
I know it's wise to upgrade the IC, piping, etc. But, and correct me if I'm wrong (please), but I'm looking at the 2554 because (a) 300 hp is fine with me, I just want a turbo upgrade, and more importantly (b), as the smallest, it's the closest to the factory's spec, so the least-likely to put excess strain on the rods, shafts, and linkages. Does this sound accurate?