They should work on an '05. If it really does work on an '03, then it clears the Duratec's oil pan and will be fine for an '05. However, I'd be suspicious that if the company left out the 2004 model year, it won't work on any Duratec at all, even the '03s.
Well, a Civic might work differently. I don't hink it does, since we both have Mac strut front suspension, but it's possible that it does help on a Civic. Or, maybe he screwed his suspension up so badly (700 lb/in eBay coils and stock dampers) that a solid bar bolted to his control arms actually makes things better.