Those motors in the 03 snake can handle tons of power. I remember reading a few months ago that they have one running around 1000hp on the stock bottom.

1999 Mystique LS V6 Alpine CDA-9807, Rear deck sub, Opt. TB, K&N RU-3530/MAF adaptor, custom heatshield, FSVT 17's, SCT 4-program chip, Eibach's/ST200's, Hella Fogs...