That chip is not for turbos and I wouldn't want it. Dealer flashes your pcm and you lose it all. Stage 1 may or may not cause warranty issues. Depends on the dealer. My dealer said if Stage 1 causes a problem my warranty could be affected. He said my warranty is not voided just because I have Stage 1. Some dealers will void your warranty for any mod. Luckily mine won't. Go here for Stage 1 info.
http://www.mopar.com/pt_stage_1.htm
For an '04 it just considts of a new pcm, but same price as an '03.
An '03 turbo is rated at 215 hp, but it is more like 220 hp. So stage 1 should take you to 240 hp plus your mods. An '04 is rated at 220 hp because it already has the stage 1 injectors and with stage 1 is rated at 240 hp.