I have read alot lately that guys are putting pi intakes and cams on npi engines with npi heads. I understand this is good for cars running superchargers that dont want the increase in CR. I also see people saying swap in stage 1 cams instead of pi cams. But after researching this I found that a pi cam has the same specs as a stage 1 npi cam. So you might aswell just put in a pi cam instaed of going stage 1 for $575.
http://www.crower.com/cat/domestic/ford/mustang_camshafts.shtml
http://www.crower.com/cat/domestic/ford/mustang_camshafts.shtml