The Performer X is the street manifold, the vicX is really for turbo cars making over 350whp. Consider a Performer X or a Skunk2Pro, both are great IM's.
lots of mid range gains. performer x has longer runners than almost all honda intake manifolds. hard to make power past 8500rpms with this manifold. all in all its great for practical daily driving, i use one and am happy with it.