If you are looking at the Limited then prepare to brake the bank big time. There are not alot of performance mods out there for the XFire, Renntech, Startech, Brabus & Carlsson will run you about $10,000.00 to $22,000.00 depending on what you are looking for. If speed is what you need then you need to focus on the XFire SRT6, 330 HP Supercharged, this car originally sold for $51,000.00 but can be had for $33,000.00 to $40,000.00 these days since they will no longer be produced. You can still find these on dealer lots and they will discount them a bit due to poor sales, there are a few slightly used ones on Ebay.

http://cgi.ebay.com/ebaymotors/Chrys...61484444QQrdZ1

http://cgi.ebay.com/ebaymotors/Chrys...60580913QQrdZ1

http://cgi.ebay.com/ebaymotors/Chrys...61486804QQrdZ1