Welcome to the board. The intercooler is good for about 10 to 15 hp. The stock intercooler isn't very big and get heat soaked very quickly. The pulley is good for about 30 hp and about 48 ft-lbs of torque. The is no CAI made at this time you'll have to make your own. Those who hve say 6 hp. Exhaust changes such a muffler or catback system are about 4 hp. A much larger gain can be made with a header, but no one on the boards has done that.
To install the intercooler, the front bumper must be removed, and the fog lights and temperature sensor disconnected. The old intercooler is removed. Test fit the new intercooler and drill four holes for the now mounts. Felt is applied to the air con lines and to whatever might rub on the new intercooler. Mount the intercooler, connect the hoses. Reconnect fogs and temp sensor and replace bumper.
Kleeman is working on replacing the Eaton rootes type supercharger with a larger Lysholm twin screw supercharger. It is suppsed to cost $3000 and increase the rwhp by 100 hp, with no other mods.