Turbosmart ProOPR Rising Rate Turbo Oil Pressure Regulator weld polished wheels and general characteristics that make and general characteristics that make our Aluminum Connecting Rods superior to common forgings The Injen Evolution Air intakes that use our Twist Lock System have been strategically designed to use fewer parts to provide the end user with one of the quickest and simplest installations available on the market today Turbosmart ProOPR is a rising rate oil pressure regulator for your turbocharger not unlike your fuel pressure regulator and allows lower oil pressure at lower boost pressures and increases oil supply pressure to the bearing system at higher boost levels