Okay so I read through a guide on how to change the stock TB to a 74mm TB, I am interested in doing so, but will I still be able to hook a needswings CAI? I have no modification experience, I have only changed out stock parts for new ones.

Also what's the size of the original one, and how did the 74mm come about? I mean how do I search or find out information when I want to try something new. How did you guys find out all the different part that'll fit from one car to another?

 

The OEM NA TB is 68mm.
The 74mm comes from a MB model that has a larger displacement engine, or from a Crossfire SRT6.
Yes, you can still utilize a CAI, the outside dimensions of the 68mm and the 74mm are the same.
To really get the bang for your bucks, you need to add in a Eurocharged tune when all is said and done.
( the EC tune is on sale just now at $300 )

NOTE: I have had a NW CAI, 74mm TB and EC tune on mine for about 4 years now.