The reply i received from kleemann on 7/22:

Thank you for contacting KLEEMANN USA! We do indeed offer supercharger systems for the crossfire, however, it is priced at $9500.00 plus installation. Our kompressor system will bring your Crossfire up to the SRT-6 power levels- 330 HP and 325 TQ. Our supercharger runs 7 PSI of boost and uses a patented air to water intercooler. Installation typically runs in the $1300-1500.00 range. The supercharger must be installed by an authorized KLEEMANN dealer. Although this is a bolt-on system, each of our dealers has been personally trained by a master KLEEMANN technician on proper installation and tuning procedures due to the complexity of installation.