BALANCED: VSR / 100,000 RPM / 1.5mg. Turbo Part Number: 3599995 3599996 4032332. Turbo OE Number: 3599997 3599998 20516147 20516242.If you are not sure about your item, please leave us your turbo number (on the turbo tag), we will check it for you. Don't give us your P O box address which we can't send by express. We adopt the same quality control equipment as original manufacturing to make high-precision turbocharger and it' s parts. In order to consistently produce high-quality products, we control our quality strictly by various balance machines that was imported from Germany, measuring machines and inpection devices. Consequently, we help customers to save time and guarantee the high performance and durabilityof turbochargers.