This whole thread is a waste if there is no before dyno. Period.
I learned that when I got dyno'd on a Mustang Dyno, only after the mods, no stock.
I could run around all day saying the JB4, and downpipe got me to 470hp!!!! OMG!?
See thread:
http://www.2addicts.com/forums/showthread.php?t=1053347