there are limitless ways to get 200whp. some people can get 200whp with ITR cams but lets be realistic. heres an example:
skunk2 stage 2 cams
at least 11:1 CR
throttle body port matched to IM
2.5" collector header
at least a 2.5" OD cat back.
some types of tuning tools..(VAFC, FPR)
as MD says it, what separates the men from the boys is tuning. tuning is the key!