You might also want to check these threads out:
NOS
TVT300
74mm Throttle Body
Mercedes-Airbox
In general I think the TVT250 and TVT265 kits from
TVT-Design are a good start for mods on a NA Crossfire. But really, like Violenteer said - the search works great and in this forum you'll find nearly everything you'll need to know about this car.