Tested tried and true, our Variable Boost Controller (VBC) has been around for years, the best way to adjust boost on any turbo charged application! *Manufactured in the USA*. Same regulator found in the Turbonetics and HKS manual boost controller kits! This is not a bleed type controller, its an actual pressure regulator! Not like Turbosmart, Hallman, or any bleed valve, this actual regulates pressure to the top of your wastegate, where as the others just bleed of air to the main wastegate port tricking the wastegate into thinking there is less boost pressure.