A few years ago I used a couple of TB gaskets as a template to bang out a throttle body spacer in 6061.

It wasn't because I believed the hype, it was more a matter of it being an easy and fun project.
After installation, adjusting cables/brackets, etc., I decided that it was not worth the effort to either manufacture or install. It did nothing for driveablity, mileage, power or otherwise. I used that leftover scrap to make a nice battery hold-down.

Granted, mine was the product of 45 minutes on a mill, with zero testing or prototyping. It also didn't look 1/10th as pretty as the model you're showing. If I were looking for a bit of underhood bling, it might make it on my list. It is a nice piece of work.

No one's ever proven that these things perform, but they sure look nice -and sometimes that's enough.

You want a faster truck? Ditch those heavy wheels and tires - you'd be amazed.