No, you are fine running a CAI and a 178mm pulley without a tune.
You will need a tune to maximize the benefits of the combo however.

If you run a 181mm pulley, 185mm pulley or run a "stacked combo" 178mm pulley + a smaller supercharger pulley you HAVE to have a tune.


Install your 178mm pulley, with a new crank bolt and enjoy it!

Cheers,
KrzyFast