Personally I feel that no VTEC Honda motor responds well to bolt ons. I have many friends with B16A engines, and their dilemma is the same as ours -- turbo it, or build the internals. These are not highly detuned Toyota engines...
Type S and SiR are both 5th generation designations (although I am vaguely remembering a 4th gen SiR). These are both H22A engines and thus their valve covers will fit any H22A. It's mostly aesthetic and you could paint the cover with some krinkle paint yourself..