I installed the Z32 engine in my car back in 1994 and ran it with the stock turbos with all my own custom pipe. I ran 100 octane and 19 psi boost for over seven years with the stock turbos. The engine has never been apart except the valve covers and that was to paint them. It is still that same stock block and heads that have never been apart that have the TD05-16G turbos now that just ran the 10.08 @ 140 MPH pass. Also The stock turbos that ran 19 psi for 7 years were still good when they were pulled to install the TD05's.