Turbosmart OPR V2 Turbo Oil Pressure Regulator TS-0811-0012 The Turbosmart OPR V2 is a World First Return-Less Regulator which achieves target oil pressure through Turbosmart's Patent Pending flow control strategy, to delivery a laminar flow of oil to your turbocharger, no matter the base engine oil pressure or temperature. Suitable for all known engine oils, the OPR V2 from Turbosmart will down regulate any oil pressure to ensure the critical balances inside your turbocharger (Exhaust Drive, Back & Charge Pressures) aren't compromised by over-pressurised engine oil causing consumption of oil and smoking.