After 3 years of a basically stock 2003 Gt I'm looking to add more power. Need some opinions on the various options with the lowest budget. Seems none of them are really cheap unless you can find a good used supercharger. I have looked at the various supercharger and turbo options available (kenne bell, vortex, procharger, torktech, trickflow, & on3 turbo). Many seem to be personal preference and all have there drawbacks. I think the supercharger is the way to go vs. cams & heads. Goal is to be in the 350 to 400 hp range and very safe. Car has 35,000 pampered miles with cat back exhaust, CAI & 75 mm TB. My gut tells me to go for the basic Vortex V3 unit non-intercooled with a professional tune. My thoughts are this is the cheapest option (want to stay under $4000), easiest to install and a relatively safe. In the end if my needs change it can easily be removed and sold for $2000. Want to do most of the work myself as a winter project - many of the options require new hood, moving the battery, or tubular k-member which increase the cost. Currently have stock gears - are these OK for supercharger option or go to 3.73? Have always used this sight for honest, good advice based on everyones experience. Welcome your opinions on the best options or something different? Thanks!