just so i'm makeing myself clearerer in this post...
intake = turbo inlet pipe
hot pipe = turbo to intercooler
cold pipe = intercooler to manifold
it makes sense, but the materials have to be selected correctly. header wrap is NOT the right material for an intake wrap. you want a blanket somthing-or-other for the intake. also, you want to make sure the intake inlet is located in a cool area, or it will all be for nothing. wrapping the intake might be beneficial.
now, the hot pipe and cold pipe, if you have aluminum versions of these, leave them exposed to help shed as much heat as possible. that is, unless your intercooler is much biggert han it needs to be and your cold pipe is actually flowing with ambient temperature air. of course, you will need a temperature probe to determine this first.
speaking of temperature probes, if you are that serious about this project, you might consider getting an intake air temperature gauge to find out exactly what your air temps in the pipes are, and under what condisitons they occur. but, i'm sure you already knew that
on the flip side, wrapping your intake means crap if you haven't wrapped (or coated) your exhaust side. if your manifold and down-pipe are bare, get them ceramic coated before you focus on the intake side. its meaningless to wrap your intake if the exhaust is radiating a b****-load of heat into the engine bay.