hey guys, any idea how i can gain more horsepower and torque beside a supercharger on a 03 xtreme?

CAI, under drive pullies, bore out throttle body, mass air flow sensor, better exhaust system (Have to get one custom made), electric fan, power programmer, throttle body spacer (if applicable) (depends on your CAI), 180 degree thermostat, performance chip (not really recommended). That should get you plenty of speeding tickets and an empty wallet. There really isn't many performance parts for us. Nice to see another Blazer X up in here.

im not a big fan of yellow, but your blazer looks really good in it! nice ride!