CAI question.

[Snakes97GT]

I own a '97 Mustang GT with a 4.6L v8. I recently installed a cold air intake kit, 75mm throttlebody, and a C&L upper intake plenum. The exhaust system is stock. One of my two questions is: With all the upgrades I installed, would my MAF peg out and limit performance since more air is entering the engine? I was looking at a 90mm lightning maf because it's bigger. My second question is: Would a cat-back exhaust system like the flowmaster american thunder w/delta 40 series mufflers give me a noticeable improvement in performance and power? Someone please help a devoted mustang lover. :)

[Bonestock GT]

You do not need a bigger mass air at this point. If you put on an off road h pipe and a cat back system there will be an improvement.