Most D16 kits will work on D15s, but the only D15 that was VTEC was the JDM D15B (to my knowledge). I'm not sure if that effects the kits or not. I know the exhaust manifolds fit the same. The intake manifold may position the TB differently so the charge pipe may need some custom fitting.

That's really all that I can think of being mechanically different (but not unusable).