Mods include, but are not limited to the following:
Eurocharge engine dyno tune
Eurocharge transmission tune
supercharger pulley size reduction
idler pulley
tensioner pulley
scatter shield for s/c pulley
cat delete exhaust or catback exhaust
electronic accelerator pedal tuner "sprint booster"
dual air intake from Needswings
intercooler inhancer
supercharger waterpump upgrade (Bosch upgrade)

Some of these mods can be omitted, but to get the best of the street usable, almost all of these improve the performance. Lowering springs would also help the handling; Eibach is the best brand, but cutting the OEMs would work if done right.