Nothing needs to be modified although my fingers are a little "modified" trying to get the size right...

You can upgrade the Y do SL55 standards or go the Code 3 intake mod, but really for a daily driven pulley, ecu tune, cooling mod SRT, the stock Y is not all that restrictive.

By all that restrictive I mean you will not see a 10+ HP gain from just a Y-pipe swap. Usually anything under 10HP you will not be able to feel, unless you track it, anyway. You can realistically get a stock appearing intake upgrade with better filters for a couple hundred dollars.

We produce a CAI and I fully stand behind the product, but since we started playing with the stock set up it hasn't been on the engine.

I'd love to do a CAI vs. Full modded stock intake on a SRT to see how the power curve differs. My guess is if the IATs are the same you will see more power under the curve for the stock set up and more peak power for the CAI. I've already tested this on the N/A and it holds true time and time again.