This probably isn't exactly what you're looking for, but the owner of the shop i work at has one on his 2002 Chevy Silverado 1500 HD, with the 6.0 L. It's made by a company called AIRRAID. The concept makes sense, and you can tell it's working because it makes this whistling sound.........almost like a turbo charger.
His butt dyno felt a gain, yet it's a COMPLETELY different application.
His butt dyno felt a gain, yet it's a COMPLETELY different application.