i put together my kit for about $1600
gauges- wideband, boost, oil temp
intercooler and bov
dsm injectors
manifold
wastegate
downpipe
- not including fuel management (hondata s300), tune and exhaust.
this is pretty cheap
GO-AUTOWORKS Turbo Kits Honda Civic Acura Integra D16 B16 B18
then ontop of that you'll need a few other things,
fuel management
spark plugs
injectors
exhaust