The Turbosmart ProOPR Rising Rate Turbo Oil Pressure Regulator (Part #TS-0801-1012) is a high-performance automotive component from Turbosmart. Turbosmart's Patent Pending OPR T40 is an Oil Pressure Regulator designed for your Turbocharger. Many Turbochargers are built around a bearing and oil pressure profile much lower than is seen by modern & hi-performance, engines and feeding these turbochargers the appropriate amount of oil pressure hase always been a challenge. Designed as a direct-fit upgrade with straightforward installation. Backed by Turbosmart's reputation for quality and performance in forced induction systems.