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First, welcome to the Forum from NH.
Doesn't your 2018 6.2 already have a stock cold air intake? If yes, I'm wondering why you want to change it.
From what I have read, any performance improvement differences from an aftermarket CAI versus no CAI is minimal, and if your 2018 already has a stock CAI, then any performance improvement differences with an aftermarket CAI would be even less. There would potentially be a difference in sound coming from under the hood during hard acceleration, so one would have to ask how much money is the sound difference worth.
I changed the air intake tube (only, called an MIT) on my 07 6.2, and installed a K&N air filter in my stock CAI air filter chamber. But, I did that prior to receiving my Black Bear Performance tune, and the tune itself accounted for the increased performance.