If it seems like tinkering in the engine compartment of the EP3 Civic Si or DC5 RSX-S is a bit confined, you'd be right. The K-series motor's orientation, in addition to being contrary to what most Honda heads are used to, also contributes to the lack of workable space under the hood. You can tell just by looking at it; there's virtually no space around the intake manifold and power steering pump, the header has minimal clearance next to the firewall, and damned if that airbox doesn't take up a huge chunk of the engine bay.
Hurry and pick up the March 2005 issue of Honda Tuning Magazine for the complete story, and a lot more photos.