That SS side scoop on the bonnet would look really good,
Although, given the current engine range and Type approval rules.. would probably end up being non-functional/ornamental...
Would be a great opportunity though to come up with a decent intake system... there are plenty of Duratec induction systems that could be used as a basis of a kit.
Just think of all that cold dense air.. and the possibility of an after-market kit for all the existing +4's as a retrofit (with warranty?).