i am running TDI tuning piggy back tune. basically a tuning box. works like others with multiple settings.

it’s fairly cheap and i do notice a difference in power and worth the money. TDI won’t ship to CARB restricted states.

im toying with the idea of doing either a upper or lower pulley and full tune.

the 5.0 supercharger v8 has been around for awhile. from what i have read and watched the pulley/tune is your best bang for the buck of your willing to take it that far