I guess thats why the ST200 has a cleaned out UIM then to release some valuable horses. I do wonder though if the UIM isn't the one part of the engine that drags it down, yeah it was obviously optomized at some point when the engine was designed, but that could be for an efficent power delivery or emmisions/economy etc. Not all out power?
Untill someone fits an alternative inlet manifold though we will never know. (it has been the norm in tuning circles to change inlet pipes to gain power as can be seen from the Zetec boys manifolds)
.....but we will do soon eh Dave