If you want the most out of your SC, a bigger air filter than the one that comes with the kit will help. Also the Vortech spec MSDS headers (Which will require an oil filter relacation kit I believe, but I'm not exactly sure on that one though). And finally a new y pipe with cat, and cat back exhaust system. The you'll be getting the most out of her!!
Have fun!!
Also a lot of ppl like to get the A pillar gauge pod (w/ air fuel ratio, boost gauge.... etc)