Intake or Exhaust?

Intake or Exhaust? PLEASE HELP!!!!

Ok, i need a little help.
Im strapped for cash and im tryin to figure out whether or not i should go with an Aftermarket TB or Headers first. I need you guys to help me figure out what would benefit me the most... I have aftermarket Exhaust as you can see. Im kind leaning towards a new TB because i have a 4inch powerpiped, tryin to flow through a Stock TB. I would appreciate Help/suggestions in any way.

Also i have a 99 cobra with the 80 mm MASS air. Can anyone out there tell me if they make a bigger MASS air for my car, and if not, is the aftermarket MASS air really worth it?

THANKS!
 
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