Aftermarket intake manifold

[Rap Tour87]

I have a 2011 Gen1 6.2 has anyone come across any intake manifold upgrades for n/a applications?

 

[MTF]

Nope, there isn't anything.
Supercharging is your best bang for your bucks.

 

[Canuck714]

To add a little context to what MTF stated.
There is virtually no aftermarket support for this engine.
I think there was a shop that was hand making a carb set up, but that's probably not the direction you want to go.... You would be a couple grand in for a sheetmetal intake that would want RPM, which means cams (good luck)
Better off going with a blower.