Need advice/help with questions...

[RMaddGT]

Okay with an 02 GT... Mods include for induction/exhaust Magnaflow X-pipe with cats and Magnaflow Magnapacks Cat-Back Exhaust and a K&N FIPK for Induction... my question is what size MAF should I look for if it would help (and by which manufacturer that has a good price). What size Throttle Body for staying N/A (what brands?) and pairing up with an upper plenum (brand also?) thanks!